Knowledge

Normal number

Source 📝

1840: 1530: 1835:{\displaystyle {\begin{aligned}&\alpha =\prod _{m=2}^{\infty }\left({1-{\frac {1}{f\left(m\right)}}}\right)=\left(1-{\frac {1}{4}}\right)\left(1-{\frac {1}{9}}\right)\left(1-{\frac {1}{64}}\right)\left(1-{\frac {1}{152587890625}}\right)\left(1-{\frac {1}{6^{\left(5^{15}\right)}}}\right)\ldots =\\&=0.6562499999956991\underbrace {99999\ldots 99999} _{23,747,291,559}8528404201690728\ldots \end{aligned}}} 2862:, including possibly the empty string. (Since one digit is read from the input sequence for each state transition, it is necessary to be able to output the empty string in order to achieve any compression at all). An information lossless finite-state compressor is a finite-state compressor whose input can be uniquely recovered from its output and final state. In other words, for a finite-state compressor 1033:(as its Lebesgue measure as a subset of the real numbers is zero, so it essentially takes up no space within the real numbers). Also, the non-normal numbers (as well as the normal numbers) are dense in the reals: the set of non-normal numbers between two distinct real numbers is non-empty since it contains 99:
be sequences such as 10, 100, or more consecutive tails (binary) or fives (base 6) or even 10, 100, or more repetitions of a sequence such as tail-head (two consecutive coin flips) or 6-1 (two consecutive rolls of a die), there will also be equally many of any other sequence of equal length. No digit
86:
Intuitively, a number being simply normal means that no digit occurs more frequently than any other. If a number is normal, no finite combination of digits of a given length occurs more frequently than any other combination of the same length. A normal number can be thought of as an infinite sequence
1056:
in order, is normal in base 10. Likewise, the different variants of Champernowne's constant (done by performing the same concatenation in other bases) are normal in their respective bases (for example, the base-2 Champernowne constant is normal in base 2), but they have not been proven to be normal
2507:
is also normal. In other words, if one runs a finite-state machine on a normal sequence, where each of the finite-state machine's states are labeled either "output" or "no output", and the machine outputs the digit it reads next after entering an "output" state, but does not output the next digit
1524: 1334:
are strongly conjectured to be normal, it is still not known whether they are normal or not. It has not even been proven that all digits actually occur infinitely many times in the decimal expansions of those constants (for example, in the case of π, the popular claim "every string of numbers
3354: 1377: 3135:
These characterizations of normal sequences can be interpreted to mean that "normal" = "finite-state random"; i.e., the normal sequences are precisely those that appear random to any finite-state machine. Compare this with the
2204:(Copeland and Erdős 1946). From this it follows that Champernowne's number is normal in base 10 (since the set of all positive integers is obviously dense) and that the Copeland–Erdős constant is normal in base 10 (since the 3034: 536: 3236: 340: 2798: 1021:
absolutely normal number. Although this construction does not directly give the digits of the numbers constructed, it shows that it is possible in principle to enumerate each digit of a particular normal number.
1226:. (This result includes as special cases all of the above-mentioned results of Champernowne, Besicovitch, and Davenport & Erdős.) The authors also show that the same result holds even more generally when 2490:
number of digits in any normal sequence leaves it normal. Similarly, if a finite number of digits are added to, removed from, or changed in any simply normal sequence, the new sequence is still simply normal.
3418: 2074: 3221: 2924: 1535: 2408: 2473: 1893: 2133: 2194: 3079: 1973: 2833: 2303: 2602: 2697: 2003: 973:, a number can be simply normal (but not normal or rich), rich (but not simply normal or normal), normal (and thus simply normal and rich), or none of these. A number is 4668: 2727: 2651: 2960: 1938: 2564: 2544: 444: 1041:). For instance, there are uncountably many numbers whose decimal expansions (in base 3 or higher) do not contain the digit 1, and none of those numbers are normal. 265: 1860:
Every non-zero real number is the product of two normal numbers. This follows from the general fact that every number is the product of two numbers from a set
2743: 1519:{\displaystyle f\left(n\right)={\begin{cases}n^{\frac {f\left(n-1\right)}{n-1}},&n\in \mathbb {Z} \cap \left[3,\infty \right)\\4,&n=2\end{cases}}} 2699:
fraction of the gambler's money on the bit 1. The money bet on the digit that comes next in the input (total money times percent bet) is multiplied by
4397: 4393: 4292: 4638: 3140:, which are those infinite sequences that appear random to any algorithm (and in fact have similar gambling and compression characterizations with 4487:(1917), "Démonstration élémentaire d'un théorème de M. Borel sur les nombres absolutment normaux et détermination effective d'un tel nombre", 4428: 4189: 2729:, and the rest of the money is lost. After the bit is read, the FSG transitions to the next state according to the input it received. A FSG 1349:
is normal), and no counterexamples are known in any base. However, no irrational algebraic number has been proven to be normal in any base.
4040: 1169:
being any non-constant polynomial whose values on the positive integers are positive integers, expressed in base 10, is normal in base 10.
3806: 3349:{\displaystyle \lim _{n\rightarrow \infty }{\frac {1}{n}}\sum _{k=0}^{n-1}e^{2\pi imb^{k}x}=0\quad {\text{ for all integers }}m\geq 1.} 883:
is a sequence in which every finite string appears. A normal sequence is disjunctive, but a disjunctive sequence need not be normal. A
3132:
compresses asymptotically as well as any ILFSC, this means that the LZ compression algorithm can compress any non-normal sequence.
4581: 4534: 3365: 4384: 4113: 3969: 3787: 2340:
A number is normal if and only if it is simply normal in every base. This follows from the previous characterization of base
2012: 3105:
Schnorr and Stimm showed that no FSG can succeed on any normal sequence, and Bourke, Hitchcock and Vinodchandran showed the
4800: 4795:
Quéfflec, Martine (2006), "Old and new results on normality", in Denteneer, Dee; den Hollander, F.; Verbitskiy, E. (eds.),
3981:(1935), "The asymptotic distribution of the numerals in the decimal representation of the squares of the natural numbers", 3166: 2877: 4714: 2511:
A deeper connection exists with finite-state gamblers (FSGs) and information lossless finite-state compressors (ILFSCs).
2354: 4589: 4826: 4759: 4722: 4274: 4018: 3128:, a quantitative measure of its deviation from normality, which is 1 exactly when the sequence is normal). Since the 2417: 196: 4780: 4625: 4573: 4220: 3879: 3826: 3137: 2522: 1863: 4297: 3978: 2079: 1128: 2146: 1061: 4884: 4710: 4329: 4266: 3950: 3039: 1950: 3118:
A sequence is normal if and only if it is incompressible by any information lossless finite-state compressor
2803: 2273: 1313:
It has been an elusive goal to prove the normality of numbers that are not artificially constructed. While
4889: 4160: 1207: 796:
A given infinite sequence is either normal or not normal, whereas a real number, having a different base-
172: 4105: 4068:
Bourke, C.; Hitchcock, J. M.; Vinodchandran, N. V. (2005), "Entropy rates and finite-state dimension",
3887: 3779: 3101:
above) can always be made to equal 1 by the 1-state ILFSC that simply copies its input to the output.
2569: 1331: 155: 20: 4082: 1403: 1013:) showed that it is possible to specify a particular such number. Becher and Figueira ( 807:, may be normal in one base but not in another (in which case it is not a normal number). For bases 3224: 3121:(they actually showed that the sequence's optimal compression ratio over all ILFSCs is exactly its 2656: 998: 1982: 4180: 3751: 2943: 1074: 3922: 4879: 4670:
Developments in Language Theory: At the Crossroads of Mathematics, Computer Science and Biology
4484: 4254: 4077: 3770:
Adamczewski, Boris; Bugeaud, Yann (2010), "8. Transcendence and diophantine approximation", in
3094: 2859: 2702: 2611: 1327: 1006: 1917: 3959: 3741: 2549: 2529: 1044: 903: 131: 4629: 3756: 2500: 2205: 1299: 880: 4836: 4769: 4732: 4368: 4320: 4284: 4123: 3819: 3797: 2255:) and made explicit in the work of Bourke, Hitchcock, and Vinodchandran ( 1335:
eventually occurs in π" is not known to be true). It has also been conjectured that every
8: 4633: 4424: 3771: 3228: 3123: 3112:
A sequence is normal if and only if there is no finite-state gambler that succeeds on it.
559: 258: 135: 49: 4804: 4776: 4703: 4682: 4660: 4614: 4606: 4473: 4356: 4338: 4239: 4155: 4057: 3998: 3910: 3868: 3834: 3746: 3721: 3719: 3106: 2935: 127: 3941: 2503:
and normal sequences: every infinite subsequence selected from a normal sequence by a
1085:). More generally, the latter authors proved that the real number represented in base 876:
irrational, there are uncountably many numbers normal in each base but not the other.
4852: 4822: 4755: 4718: 4509: 4380: 4270: 4109: 4061: 4024: 4014: 4002: 3965: 3783: 2546:, each of whose states is labelled with percentages of money to bet on each digit in 1362: 1336: 1018: 119: 4529: 4477: 4243: 4203: 3872: 3716: 4832: 4814: 4765: 4728: 4674: 4647: 4610: 4602: 4598: 4577: 4551: 4543: 4496: 4465: 4453: 4440: 4411: 4402: 4364: 4348: 4316: 4306: 4280: 4229: 4211: 4198: 4169: 4142: 4130: 4119: 4087: 4049: 3990: 3945: 3937: 3914: 3906: 3902: 3883: 3858: 3850: 3830: 3815: 3793: 2504: 1845: 1339: 1314: 1158: 139: 123: 4855: 4652: 562:
frequency. For example, in a normal binary sequence (a sequence over the alphabet
4743: 3854: 3593: 3029:{\displaystyle \liminf _{n\to \infty }{\frac {|C(S\upharpoonright n)|}{n}}<1,} 2740:
if, starting from $ 1, it makes unbounded money betting on the sequence; i.e., if
2508:
after entering a "no output state", then the sequence it outputs will be normal.
1358: 1307: 826: 673: 130:, and only a few specific numbers have been shown to be normal. For example, any 57: 4752:
Surveys in number theory: Papers from the millennial conference on number theory
3838: 2305:. This follows from the previous block characterization of normality: Since the 531:{\displaystyle \lim _{n\to \infty }{\frac {N_{S}(w,n)}{n}}={\frac {1}{b^{|w|}}}} 4818: 4525: 4262: 4250: 3474: 3437: 3160: 3141: 3098: 2939: 2848: 2212: 1053: 718: 4556: 4173: 4092: 4035: 3778:, Encyclopedia of Mathematics and its Applications, vol. 135, Cambridge: 990: 4873: 4547: 4038:(1909), "Les probabilités dénombrables et leurs applications arithmétiques", 4028: 1372:) gives an example of an irrational number that is absolutely abnormal. Let 1154: 947: 88: 4445: 4416: 4311: 4215: 4184: 1078: 4747: 4698: 4664: 4234: 1070: 1025:
The set of non-normal numbers, despite being "large" in the sense of being
4147: 335:{\displaystyle \lim _{n\to \infty }{\frac {N_{S}(a,n)}{n}}={\frac {1}{b}}} 4739: 3478: 1361:
is normal in any base, since the digit sequences of rational numbers are
1026: 885: 692: 661: 31: 27: 4809: 4663:(1994), "Borel normality and algorithmic randomness", in Rozenberg, G.; 4799:, IMS Lecture Notes – Monograph Series, vol. 48, Beachwood, Ohio: 4469: 4360: 4053: 3994: 2487: 1185: 1005:
real numbers are normal, establishing the existence of normal numbers.
1002: 115: 4501: 3863: 3632: 3362:
is normal in base β for any real number β if and only if the sequence
2251:, etc.) This was implicit in the work of Ziv and Lempel ( 4860: 4521: 4343: 4249: 3725: 2793:{\displaystyle \limsup _{n\to \infty }d(S\upharpoonright n)=\infty ,} 943: 383: 4352: 4158:(1933), "The construction of decimals normal in the scale of ten", 1165:) proved that the number represented by the same expression, with 1038: 1030: 186: 111:) if it is normal in all integer bases greater than or equal to 2. 4742:(2002), "One hundred years of normal numbers", in Bennett, M. A.; 4685:; Zamfirescu, T. (1999), "Most numbers obey no probability laws", 1135:) proved that the number represented by the same expression, with 2219:
of equal length appears with equal frequency. (A block of length
897:
is disjunctive: one that is disjunctive to every base is called
684: 39: 3964:(illustrated ed.), American Mathematical Soc., p. 13, 3804:
Agafonov, V. N. (1968), "Normal sequences and finite automata",
3523: 1200:> 0, then the real number represented by the concatenation 672:
is precisely that expected if the sequence had been produced at
4797:
Dynamics & Stochastics: Festschrift in honor of M. S. Keane
4400:(1992), "Discrepancy estimates for a class of normal numbers", 2351:-normal if and only if there exists a set of positive integers 92: 4530:"Compression of individual sequences via variable-rate coding" 4516:, Ph.D. thesis, Berkeley, California: University of California 2227:
appearing at a position in the sequence that is a multiple of
4104:, Cambridge Tracts in Mathematics, vol. 193, Cambridge: 3837:; Dinneen, Michael J.; Dumitrescu, Monica; Yee, Alex (2012), 1052:
obtained by concatenating the decimal representations of the
42: 4582:"On the random character of fundamental constant expansions" 4456:; Stimm, H. (1972), "Endliche Automaten und Zufallsfolgen", 4067: 2858:
is a finite-state machine with output strings labelling its
2256: 3129: 1512: 4133:(1959), "On a problem of Steinhaus about normal numbers", 4013:(Anniversary ed.), Hoboken, N.J.: Wiley, p. 15, 3825: 3638: 3413:{\displaystyle \left({x\beta ^{k}}\right)_{k=0}^{\infty }} 3147: 558:
is normal if all strings of equal length occur with equal
3455: 3567: 3565: 3513: 3511: 4750:; Diamond, H.G.; Hildebrand, A.J.; Philipp, W. (eds.), 3620: 2653:
of the gambler's money on the bit 0, and the remaining
2069:{\displaystyle |A\cap \{1,\ldots ,n\}|\geq n^{\alpha }} 1323: 1049:
0.1234567891011121314151617181920212223242526272829...,
148: 138:). It is widely believed that the (computable) numbers 52:
is distributed uniformly in the sense that each of the
4850: 4261:, Mathematical Surveys and Monographs, vol. 104, 3644: 3552: 3550: 2494: 4102:
Distribution modulo one and Diophantine approximation
3923:"An example of a computable absolutely normal number" 3704: 3692: 3562: 3508: 3368: 3239: 3216:{\displaystyle {\left(b^{k}x\right)}_{k=0}^{\infty }} 3169: 3042: 2963: 2880: 2806: 2746: 2705: 2659: 2614: 2572: 2552: 2532: 2420: 2357: 2276: 2149: 2082: 2015: 1985: 1953: 1920: 1866: 1533: 1380: 447: 268: 4327:
Martin, Greg (2001), "Absolutely abnormal numbers",
3680: 3496: 3484: 2919:{\displaystyle f:\Sigma ^{*}\to \Sigma ^{*}\times Q} 2566:. For instance, for an FSG over the binary alphabet 3547: 2526:) is a finite-state machine over a finite alphabet 4702: 3769: 3608: 3535: 3529: 3412: 3348: 3215: 3073: 3028: 2918: 2827: 2792: 2721: 2691: 2645: 2596: 2558: 2538: 2475:No finite set suffices to show that the number is 2467: 2403:{\displaystyle m_{1}<m_{2}<m_{3}<\cdots } 2402: 2297: 2188: 2127: 2068: 1997: 1967: 1932: 1887: 1834: 1518: 1265:where the αs and βs are real numbers with β > β 1066:0.23571113171923293137414347535961677173798389..., 915:, but not necessarily conversely. The real number 530: 334: 4624: 3951:20.500.12110/paper_03043975_v270_n1-2_p947_Becher 1856:Additional properties of normal numbers include: 989:The concept of a normal number was introduced by 695:. Consider the infinite digit sequence expansion 19:For the floating-point meaning in computing, see 4871: 4681: 4639:Proceedings of the American Mathematical Society 3668: 3656: 3241: 2965: 2748: 957:if each individual digit appears with frequency 953:We defined a number to be simply normal in base 449: 270: 4697: 3443: 1073:in base 10, is normal in base 10, as proved by 4572: 4210: 3920: 3878: 3461: 3358:This connection leads to the terminology that 1295: 1162: 1037:(in fact, it is uncountably infinite and even 1014: 4788:Clay Mathematics Institute Annual Report 2006 4489:Bulletin de la Société Mathématique de France 4392: 4190:Bulletin of the American Mathematical Society 4179: 3961:Inevitable Randomness in Discrete Mathematics 3839:"An Empirical Approach to the Normality of π" 2468:{\displaystyle m\in \{m_{1},m_{2},\ldots \}.} 2325:expansion, a number is simply normal in base 1342:is absolutely normal (which would imply that 1173: 1082: 4775: 4452: 4154: 4041:Rendiconti del Circolo Matematico di Palermo 2591: 2579: 2499:Agafonov showed an early connection between 2459: 2427: 2045: 2027: 4008: 3977: 3626: 2410:where the number is simply normal in bases 2266:if and only if it is simply normal in base 1888:{\displaystyle X\subseteq \mathbb {R} ^{+}} 1132: 721:(we ignore the decimal point). We say that 4754:, Natick, MA: A K Peters, pp. 57–74, 4483: 4257:; Shparlinski, Igor; Ward, Thomas (2003), 4161:Journal of the London Mathematical Society 3776:Combinatorics, automata, and number theory 2196:, formed by concatenating the elements of 1010: 984: 189:that may be drawn from that alphabet, and 118:real numbers are normal (meaning that the 4808: 4651: 4555: 4520: 4500: 4444: 4415: 4342: 4310: 4233: 4202: 4146: 4091: 4081: 3949: 3862: 3698: 2946:can be implemented with ILFSCs. An ILFSC 2285: 2252: 2208:implies that the set of primes is dense). 2128:{\displaystyle a_{1},a_{2},a_{3},\ldots } 1961: 1875: 1462: 159:are normal, but a proof remains elusive. 4794: 3803: 3686: 2930:to the output string and final state of 2874:is information lossless if the function 2189:{\displaystyle 0.a_{1}a_{2}a_{3}\ldots } 981:if it is not simply normal in any base. 114:While a general proof can be given that 4535:IEEE Transactions on Information Theory 4423: 4129: 4099: 3710: 3650: 3571: 3556: 3541: 3517: 3502: 3490: 3148:Connection to equidistributed sequences 3074:{\displaystyle |C(S\upharpoonright n)|} 1968:{\displaystyle A\subseteq \mathbb {N} } 1034: 16:Number with all digits equally frequent 4872: 4738: 4659: 4326: 3888:"Random generators and normal numbers" 3614: 1369: 4851: 4374: 4034: 2828:{\displaystyle d(S\upharpoonright n)} 2298:{\displaystyle k\in \mathbb {Z} ^{+}} 1352: 994: 237:denote the number of times the digit 4801:Institute of Mathematical Statistics 4508: 4290: 3957: 3674: 3662: 3449: 4715:Mathematical Association of America 4687:Publicationes Mathematicae Debrecen 4218:(1952), "Note on normal decimals", 3436:The only bases considered here are 2835:is the amount of money the gambler 2495:Connection to finite-state machines 13: 4565: 4377:Problems in analytic number theory 4187:(1946), "Note on normal numbers", 3405: 3251: 3208: 3144:replacing finite-state machines). 3081:is the number of digits output by 2975: 2901: 2888: 2784: 2758: 2711: 2573: 2553: 2533: 2486:: adding, removing, or changing a 1561: 1480: 1294:Bailey and Crandall ( 1157:in base 10, is normal in base 10. 459: 378:be the number of times the string 280: 14: 4901: 4844: 3921:Becher, V.; Figueira, S. (2002), 3227:modulo 1, or equivalently, using 2938:. Compression techniques such as 1188:with real coefficients such that 1172:Nakai and Shiokawa ( 550:denotes the length of the string 4713:, vol. 29, Washington, DC: 3138:algorithmically random sequences 2329:if and only if blocks of length 195:the set of finite sequences, or 4221:Canadian Journal of Mathematics 4204:10.1090/S0002-9904-1946-08657-7 3577: 3331: 2597:{\displaystyle \Sigma =\{0,1\}} 2337:expansion with equal frequency. 2005:and for all sufficiently large 1914:≠ 0 is a rational number, then 893:is one whose expansion in base 71:if, for every positive integer 4603:10.1080/10586458.2001.10504441 4433:Pacific Journal of Mathematics 4298:Pacific Journal of Mathematics 3907:10.1080/10586458.2002.10504704 3530:Adamczewski & Bugeaud 2010 3467: 3430: 3248: 3067: 3063: 3057: 3051: 3044: 3007: 3003: 2997: 2991: 2984: 2972: 2926:, mapping the input string of 2897: 2822: 2816: 2810: 2778: 2772: 2766: 2755: 2715: 2707: 2640: 2628: 2484:closed under finite variations 2139:expansions of the elements of 2049: 2017: 1306:-normal numbers by perturbing 1153:obtained by concatenating the 1150:0.149162536496481100121144..., 1069:obtained by concatenating the 849:) every number normal in base 520: 512: 489: 477: 456: 310: 298: 277: 162: 79:digits long have density  1: 4711:Carus Mathematical Monographs 4677:, Singapore, pp. 113–119 4653:10.1090/S0002-9939-06-08551-0 4330:American Mathematical Monthly 4267:American Mathematical Society 4009:Billingsley, Patrick (2012), 3942:10.1016/S0304-3975(01)00170-0 3762: 3420:is equidistributed modulo 1. 2692:{\displaystyle q_{1}=1-q_{0}} 2317:expansion corresponds to the 1851: 660:; etc. Roughly speaking, the 209:be such a sequence. For each 4070:Theoretical Computer Science 3930:Theoretical Computer Science 3855:10.1080/10586458.2012.665333 3807:Soviet Mathematics - Doklady 3334: for all integers  2839:has after reading the first 1998:{\displaystyle \alpha <1} 1848:and is absolutely abnormal. 1230:is any function of the form 48:if its infinite sequence of 7: 4781:"Normal numbers are normal" 4634:"A strong hot spot theorem" 3735: 3473:ω is the smallest infinite 2262:A number is normal in base 800:expansion for each integer 429:if, for all finite strings 100:or sequence is "favored". 10: 4906: 4819:10.1214/074921706000000248 4375:Murty, Maruti Ram (2007), 4106:Cambridge University Press 3780:Cambridge University Press 3462:Bailey & Crandall 2002 907:. A number normal in base 785:) if it is normal in base 747:is simply normal and that 650:each occur with frequency 608:each occur with frequency 582:each occur with frequency 122:of non-normal numbers has 56:digit values has the same 18: 4790:: 15, continued pp. 27–31 4705:Ergodic theory of numbers 4701:; Kraaikamp, Cor (2002), 4093:10.1016/j.tcs.2005.09.040 3983:Mathematische Zeitschrift 2722:{\displaystyle |\Sigma |} 2646:{\displaystyle q_{0}\in } 2482:All normal sequences are 2223:is a substring of length 1161: and Erdős ( 1017:) proved that there is a 668:in any given position in 126:zero), this proof is not 64:. A number is said to be 21:normal number (computing) 4590:Experimental Mathematics 4548:10.1109/TIT.1978.1055934 4379:(2 ed.), Springer, 4293:"Note on normal numbers" 3895:Experimental Mathematics 3843:Experimental Mathematics 3774:; Rigo, Michael (eds.), 3423: 3130:LZ compression algorithm 3085:after reading the first 2736:on an infinite sequence 2231:: e.g. the first length- 1933:{\displaystyle x\cdot a} 1119:prime expressed in base 783:absolutely normal number 719:positional number system 352:be any finite string in 185:the set of all infinite 4446:10.2140/pjm.1960.10.661 4417:10.4064/aa-62-3-271-284 4312:10.2140/pjm.1957.7.1163 4174:10.1112/jlms/s1-8.4.254 4135:Colloquium Mathematicum 4011:Probability and measure 3752:Infinite monkey theorem 3115:Ziv and Lempel showed: 2856:finite-state compressor 2559:{\displaystyle \Sigma } 2539:{\displaystyle \Sigma } 1940:is also normal in base 1062:Copeland–Erdős constant 1045:Champernowne's constant 985:Properties and examples 923:if and only if the set 390:digits of the sequence 245:digits of the sequence 103:A number is said to be 75:, all possible strings 4235:10.4153/CJM-1952-005-3 4100:Bugeaud, Yann (2012), 3414: 3350: 3292: 3217: 3075: 3030: 2920: 2829: 2794: 2723: 2693: 2647: 2598: 2560: 2540: 2469: 2404: 2299: 2190: 2129: 2070: 1999: 1969: 1934: 1889: 1836: 1565: 1520: 1184:) is any non-constant 1089:by the concatenation 899:absolutely disjunctive 773:is normal. The number 727:simply normal in base 664:of finding the string 532: 336: 4693:(Supplement): 619–623 4148:10.4064/cm-7-1-95-101 3958:Beck, József (2009), 3742:Champernowne constant 3699:Ziv & Lempel 1978 3415: 3351: 3266: 3218: 3076: 3031: 2953:an infinite sequence 2921: 2830: 2795: 2724: 2694: 2648: 2608:bets some percentage 2599: 2561: 2541: 2501:finite-state machines 2470: 2405: 2300: 2211:A sequence is normal 2191: 2130: 2071: 2000: 1970: 1935: 1895:if the complement of 1890: 1837: 1545: 1521: 1035:every rational number 1007:Wacław Sierpiński 975:absolutely non-normal 533: 337: 241:appears in the first 95:). Even though there 91:) or rolls of a die ( 4885:Sets of real numbers 4803:, pp. 225–236, 4291:Long, C. T. (1957), 4259:Recurrence sequences 4255:van der Poorten, Alf 3831:Borwein, Jonathan M. 3782:, pp. 410–451, 3757:The Library of Babel 3366: 3237: 3167: 3040: 2961: 2878: 2804: 2744: 2703: 2657: 2612: 2604:, the current state 2570: 2550: 2530: 2517:finite-state gambler 2418: 2355: 2274: 2243:, the second length- 2206:prime number theorem 2200:, is normal in base 2147: 2080: 2013: 1983: 1951: 1918: 1864: 1531: 1378: 1300:uncountably infinite 1222:, is normal in base 1218:) expressed in base 1159:Harold Davenport 1123:, is normal in base 999:Borel–Cantelli lemma 881:disjunctive sequence 445: 394:. (For instance, if 266: 4777:Khoshnevisan, Davar 4429:"On normal numbers" 4156:Champernowne, D. G. 3835:Calude, Cristian S. 3726:Everest et al. 2003 3409: 3212: 2944:Shannon–Fano coding 2333:appear in its base 1363:eventually periodic 1298:) show an explicit 979:absolutely abnormal 969:. For a given base 901:or is said to be a 687:greater than 1 and 4890:Irrational numbers 4853:Weisstein, Eric W. 4557:10338.dmlcz/142945 4470:10.1007/BF00289514 4054:10.1007/BF03019651 3995:10.1007/BF01201350 3979:Besicovitch, A. S. 3747:De Bruijn sequence 3639:Bailey et al. 2012 3410: 3369: 3346: 3255: 3213: 3170: 3156:is normal in base 3071: 3026: 2979: 2916: 2825: 2790: 2762: 2719: 2689: 2643: 2594: 2556: 2536: 2465: 2400: 2321:digit in its base 2295: 2186: 2143:, then the number 2125: 2066: 1995: 1965: 1930: 1906:is normal in base 1885: 1832: 1830: 1821: 1796: 1777:0.6562499999956991 1516: 1511: 1353:Non-normal numbers 1075:A. H. Copeland 853:is normal in base 789:for every integer 554:. In other words, 528: 463: 332: 284: 132:Chaitin's constant 107:(sometimes called 4502:10.24033/bsmf.977 4386:978-0-387-72349-5 4131:Cassels, J. W. S. 4115:978-0-521-11169-0 3971:978-0-8218-4756-5 3789:978-0-521-51597-9 3335: 3264: 3240: 3231:, if and only if 3095:compression ratio 3015: 2964: 2860:state transitions 2747: 1844:Then α is a 1781: 1779: 1753: 1705: 1679: 1653: 1627: 1598: 1447: 1287:) > 0 for all 1196:) > 0 for all 1176:) proved that if 1001:, he proved that 781:(or sometimes an 679:Suppose now that 526: 496: 448: 330: 317: 269: 109:absolutely normal 4897: 4866: 4865: 4839: 4812: 4791: 4785: 4772: 4735: 4708: 4694: 4678: 4675:World Scientific 4656: 4655: 4646:(9): 2495–2501, 4621: 4619: 4613:, archived from 4586: 4560: 4559: 4517: 4505: 4504: 4480: 4458:Acta Informatica 4449: 4448: 4420: 4419: 4403:Acta Arithmetica 4389: 4371: 4346: 4323: 4314: 4305:(2): 1163–1165, 4287: 4246: 4237: 4207: 4206: 4176: 4151: 4150: 4126: 4096: 4095: 4085: 4064: 4031: 4005: 3974: 3954: 3953: 3936:(1–2): 947–958, 3927: 3917: 3892: 3875: 3866: 3827:Bailey, David H. 3822: 3800: 3729: 3723: 3714: 3708: 3702: 3696: 3690: 3684: 3678: 3672: 3666: 3660: 3654: 3648: 3642: 3636: 3630: 3627:Billingsley 2012 3624: 3618: 3612: 3606: 3604: 3591: 3581: 3575: 3569: 3560: 3554: 3545: 3539: 3533: 3527: 3521: 3515: 3506: 3500: 3494: 3488: 3482: 3471: 3465: 3459: 3453: 3447: 3441: 3434: 3419: 3417: 3416: 3411: 3408: 3403: 3392: 3388: 3387: 3386: 3355: 3353: 3352: 3347: 3336: 3333: 3324: 3323: 3319: 3318: 3291: 3280: 3265: 3257: 3254: 3229:Weyl's criterion 3222: 3220: 3219: 3214: 3211: 3206: 3195: 3194: 3190: 3186: 3185: 3080: 3078: 3077: 3072: 3070: 3047: 3035: 3033: 3032: 3027: 3016: 3011: 3010: 2987: 2981: 2978: 2925: 2923: 2922: 2917: 2909: 2908: 2896: 2895: 2834: 2832: 2831: 2826: 2799: 2797: 2796: 2791: 2761: 2728: 2726: 2725: 2720: 2718: 2710: 2698: 2696: 2695: 2690: 2688: 2687: 2669: 2668: 2652: 2650: 2649: 2644: 2624: 2623: 2603: 2601: 2600: 2595: 2565: 2563: 2562: 2557: 2545: 2543: 2542: 2537: 2505:regular language 2474: 2472: 2471: 2466: 2452: 2451: 2439: 2438: 2409: 2407: 2406: 2401: 2393: 2392: 2380: 2379: 2367: 2366: 2309:block of length 2304: 2302: 2301: 2296: 2294: 2293: 2288: 2195: 2193: 2192: 2187: 2182: 2181: 2172: 2171: 2162: 2161: 2134: 2132: 2131: 2126: 2118: 2117: 2105: 2104: 2092: 2091: 2075: 2073: 2072: 2067: 2065: 2064: 2052: 2020: 2004: 2002: 2001: 1996: 1974: 1972: 1971: 1966: 1964: 1939: 1937: 1936: 1931: 1894: 1892: 1891: 1886: 1884: 1883: 1878: 1846:Liouville number 1841: 1839: 1838: 1833: 1831: 1823:8528404201690728 1820: 1797: 1792: 1769: 1759: 1755: 1754: 1752: 1751: 1750: 1746: 1745: 1724: 1711: 1707: 1706: 1698: 1685: 1681: 1680: 1672: 1659: 1655: 1654: 1646: 1633: 1629: 1628: 1620: 1604: 1600: 1599: 1597: 1596: 1578: 1564: 1559: 1537: 1525: 1523: 1522: 1517: 1515: 1514: 1487: 1483: 1465: 1449: 1448: 1446: 1435: 1434: 1430: 1411: 1394: 1348: 1347: 1340:algebraic number 1320: 1319: 1308:Stoneham numbers 1057:in other bases. 972: 968: 967: 966: 961: 956: 941: 922: 919:is rich in base 918: 914: 911:is rich in base 910: 896: 892: 875: 864: 860: 856: 852: 848: 838: 825: 814: 810: 806: 799: 793:greater than 1. 792: 788: 776: 772: 758:if the sequence 756: 750: 746: 732:if the sequence 730: 724: 717: 713: 709: 690: 682: 671: 667: 659: 658: 654: 649: 645: 641: 637: 633: 629: 625: 621: 617: 616: 612: 607: 603: 599: 595: 591: 590: 586: 581: 577: 573: 571: 567: 557: 553: 549: 547: 537: 535: 534: 529: 527: 525: 524: 523: 515: 502: 497: 492: 476: 475: 465: 462: 438: 424: 420: 418: 404: 402: 393: 389: 381: 377: 357: 351: 347: 341: 339: 338: 333: 331: 323: 318: 313: 297: 296: 286: 283: 252: 248: 244: 240: 236: 216: 212: 208: 194: 184: 178: 170: 151: 145: 144: 124:Lebesgue measure 4905: 4904: 4900: 4899: 4898: 4896: 4895: 4894: 4870: 4869: 4856:"Normal number" 4847: 4842: 4829: 4810:math.DS/0608249 4783: 4762: 4725: 4630:Misiurewicz, M. 4617: 4584: 4578:Crandall, R. E. 4568: 4566:Further reading 4563: 4387: 4353:10.2307/2695618 4277: 4251:Everest, Graham 4197:(10): 857–860, 4181:Copeland, A. H. 4116: 4083:10.1.1.101.7244 4021: 3972: 3925: 3890: 3884:Crandall, R. E. 3790: 3772:Berthé, Valérie 3765: 3738: 3733: 3732: 3724: 3717: 3709: 3705: 3697: 3693: 3685: 3681: 3673: 3669: 3661: 3657: 3649: 3645: 3637: 3633: 3625: 3621: 3613: 3609: 3603: 3600: 3597: 3594:fractional part 3589: 3586: 3583: 3582: 3578: 3570: 3563: 3555: 3548: 3540: 3536: 3528: 3524: 3516: 3509: 3501: 3497: 3489: 3485: 3472: 3468: 3460: 3456: 3448: 3444: 3438:natural numbers 3435: 3431: 3426: 3404: 3393: 3382: 3378: 3374: 3370: 3367: 3364: 3363: 3332: 3314: 3310: 3297: 3293: 3281: 3270: 3256: 3244: 3238: 3235: 3234: 3225:equidistributed 3207: 3196: 3181: 3177: 3176: 3172: 3171: 3168: 3165: 3164: 3150: 3142:Turing machines 3119: 3113: 3066: 3043: 3041: 3038: 3037: 3006: 2983: 2982: 2980: 2968: 2962: 2959: 2958: 2904: 2900: 2891: 2887: 2879: 2876: 2875: 2866:with state set 2805: 2802: 2801: 2751: 2745: 2742: 2741: 2714: 2706: 2704: 2701: 2700: 2683: 2679: 2664: 2660: 2658: 2655: 2654: 2619: 2615: 2613: 2610: 2609: 2571: 2568: 2567: 2551: 2548: 2547: 2531: 2528: 2527: 2497: 2447: 2443: 2434: 2430: 2419: 2416: 2415: 2388: 2384: 2375: 2371: 2362: 2358: 2356: 2353: 2352: 2289: 2284: 2283: 2275: 2272: 2271: 2177: 2173: 2167: 2163: 2157: 2153: 2148: 2145: 2144: 2113: 2109: 2100: 2096: 2087: 2083: 2081: 2078: 2077: 2060: 2056: 2048: 2016: 2014: 2011: 2010: 1984: 1981: 1980: 1960: 1952: 1949: 1948: 1919: 1916: 1915: 1879: 1874: 1873: 1865: 1862: 1861: 1854: 1829: 1828: 1798: 1782: 1780: 1767: 1766: 1741: 1737: 1733: 1732: 1728: 1723: 1716: 1712: 1697: 1690: 1686: 1671: 1664: 1660: 1645: 1638: 1634: 1619: 1612: 1608: 1586: 1582: 1577: 1570: 1566: 1560: 1549: 1534: 1532: 1529: 1528: 1510: 1509: 1498: 1489: 1488: 1473: 1469: 1461: 1453: 1436: 1420: 1416: 1412: 1410: 1406: 1399: 1398: 1384: 1379: 1376: 1375: 1359:rational number 1355: 1345: 1343: 1317: 1315: 1278: 1273:> ... > β 1272: 1268: 1263: 1257: 1247: 1204: 1151: 1105: 1067: 1054:natural numbers 1050: 991:Émile Borel 987: 970: 964: 963: 959: 958: 954: 939: 935: 931: 928: 924: 920: 916: 912: 908: 894: 890: 874: 870: 866: 862: 858: 854: 850: 847: 843: 840: 837: 833: 830: 824: 820: 816: 812: 808: 804: 801: 797: 790: 786: 774: 771: 770: 766: 762: 759: 754: 753:normal in base 748: 745: 744: 740: 736: 733: 728: 722: 715: 711: 708: 707: 703: 699: 696: 688: 680: 669: 665: 656: 652: 651: 647: 643: 639: 635: 631: 627: 623: 619: 614: 610: 609: 605: 601: 597: 593: 588: 584: 583: 579: 575: 569: 565: 563: 555: 551: 546: 543: 541: 519: 511: 510: 506: 501: 471: 467: 466: 464: 452: 446: 443: 442: 437: 433: 430: 422: 416: 414: 413: 409: 406: 400: 398: 395: 391: 387: 379: 375: 371: 367: 366: 362: 359: 356: 353: 349: 345: 322: 292: 288: 287: 285: 273: 267: 264: 263: 250: 246: 242: 238: 234: 230: 226: 225: 221: 218: 214: 210: 207: 203: 200: 193: 190: 183: 180: 176: 168: 165: 149: 142: 140: 134:is normal (and 87:of coin flips ( 82: 78: 74: 69: 66:normal in base 63: 58:natural density 55: 47: 24: 17: 12: 11: 5: 4903: 4893: 4892: 4887: 4882: 4868: 4867: 4846: 4845:External links 4843: 4841: 4840: 4827: 4792: 4773: 4760: 4736: 4723: 4695: 4679: 4657: 4622: 4597:(2): 175–190, 4569: 4567: 4564: 4562: 4561: 4542:(5): 530–536, 4518: 4514:Normal Numbers 4506: 4485:Sierpiński, W. 4481: 4464:(4): 345–359, 4454:Schnorr, C. P. 4450: 4439:(2): 661–672, 4421: 4410:(3): 271–284, 4390: 4385: 4372: 4337:(8): 746–754, 4324: 4288: 4275: 4263:Providence, RI 4247: 4208: 4177: 4168:(4): 254–260, 4152: 4127: 4114: 4097: 4076:(3): 392–406, 4065: 4032: 4019: 4006: 3975: 3970: 3955: 3918: 3901:(4): 527–546, 3876: 3849:(4): 375–384, 3823: 3801: 3788: 3766: 3764: 3761: 3760: 3759: 3754: 3749: 3744: 3737: 3734: 3731: 3730: 3728:, p. 127. 3715: 3703: 3691: 3679: 3667: 3655: 3653:, p. 113. 3643: 3631: 3619: 3607: 3601: 3598: 3587: 3584: 3576: 3561: 3546: 3534: 3532:, p. 413. 3522: 3520:, p. 102. 3507: 3495: 3483: 3475:ordinal number 3466: 3454: 3442: 3440:greater than 1 3428: 3427: 3425: 3422: 3407: 3402: 3399: 3396: 3391: 3385: 3381: 3377: 3373: 3345: 3342: 3339: 3330: 3327: 3322: 3317: 3313: 3309: 3306: 3303: 3300: 3296: 3290: 3287: 3284: 3279: 3276: 3273: 3269: 3263: 3260: 3253: 3250: 3247: 3243: 3210: 3205: 3202: 3199: 3193: 3189: 3184: 3180: 3175: 3161:if and only if 3149: 3146: 3117: 3111: 3103: 3102: 3099:limit inferior 3069: 3065: 3062: 3059: 3056: 3053: 3050: 3046: 3025: 3022: 3019: 3014: 3009: 3005: 3002: 2999: 2996: 2993: 2990: 2986: 2977: 2974: 2971: 2967: 2966:lim inf 2940:Huffman coding 2915: 2912: 2907: 2903: 2899: 2894: 2890: 2886: 2883: 2852: 2849:limit superior 2824: 2821: 2818: 2815: 2812: 2809: 2789: 2786: 2783: 2780: 2777: 2774: 2771: 2768: 2765: 2760: 2757: 2754: 2750: 2749:lim sup 2717: 2713: 2709: 2686: 2682: 2678: 2675: 2672: 2667: 2663: 2642: 2639: 2636: 2633: 2630: 2627: 2622: 2618: 2593: 2590: 2587: 2584: 2581: 2578: 2575: 2555: 2535: 2496: 2493: 2492: 2491: 2480: 2464: 2461: 2458: 2455: 2450: 2446: 2442: 2437: 2433: 2429: 2426: 2423: 2399: 2396: 2391: 2387: 2383: 2378: 2374: 2370: 2365: 2361: 2345: 2338: 2292: 2287: 2282: 2279: 2260: 2213:if and only if 2209: 2185: 2180: 2176: 2170: 2166: 2160: 2156: 2152: 2124: 2121: 2116: 2112: 2108: 2103: 2099: 2095: 2090: 2086: 2063: 2059: 2055: 2051: 2047: 2044: 2041: 2038: 2035: 2032: 2029: 2026: 2023: 2019: 1994: 1991: 1988: 1963: 1959: 1956: 1945: 1929: 1926: 1923: 1900: 1899:has measure 0. 1882: 1877: 1872: 1869: 1853: 1850: 1827: 1824: 1819: 1816: 1813: 1810: 1807: 1804: 1801: 1795: 1791: 1788: 1785: 1778: 1775: 1772: 1770: 1768: 1765: 1762: 1758: 1749: 1744: 1740: 1736: 1731: 1727: 1722: 1719: 1715: 1710: 1704: 1701: 1696: 1693: 1689: 1684: 1678: 1675: 1670: 1667: 1663: 1658: 1652: 1649: 1644: 1641: 1637: 1632: 1626: 1623: 1618: 1615: 1611: 1607: 1603: 1595: 1592: 1589: 1585: 1581: 1576: 1573: 1569: 1563: 1558: 1555: 1552: 1548: 1544: 1541: 1538: 1536: 1513: 1508: 1505: 1502: 1499: 1497: 1494: 1491: 1490: 1486: 1482: 1479: 1476: 1472: 1468: 1464: 1460: 1457: 1454: 1452: 1445: 1442: 1439: 1433: 1429: 1426: 1423: 1419: 1415: 1409: 1405: 1404: 1402: 1397: 1393: 1390: 1387: 1383: 1354: 1351: 1274: 1270: 1266: 1253: 1245: 1232: 1206:where is the 1202: 1155:square numbers 1149: 1091: 1065: 1048: 986: 983: 937: 933: 929: 926: 872: 868: 845: 841: 835: 831: 822: 818: 802: 768: 764: 763: 760: 742: 738: 737: 734: 705: 701: 700: 697: 544: 522: 518: 514: 509: 505: 500: 495: 491: 488: 485: 482: 479: 474: 470: 461: 458: 455: 451: 435: 431: 411: 410: 407: 396: 373: 369: 364: 363: 360: 354: 329: 326: 321: 316: 312: 309: 306: 303: 300: 295: 291: 282: 279: 276: 272: 249:. We say that 232: 228: 223: 222: 219: 205: 201: 191: 181: 164: 161: 80: 76: 72: 67: 61: 53: 45: 34:is said to be 15: 9: 6: 4: 3: 2: 4902: 4891: 4888: 4886: 4883: 4881: 4880:Number theory 4878: 4877: 4875: 4863: 4862: 4857: 4854: 4849: 4848: 4838: 4834: 4830: 4828:0-940600-64-1 4824: 4820: 4816: 4811: 4806: 4802: 4798: 4793: 4789: 4782: 4778: 4774: 4771: 4767: 4763: 4761:1-56881-162-4 4757: 4753: 4749: 4745: 4741: 4737: 4734: 4730: 4726: 4724:0-88385-034-6 4720: 4716: 4712: 4707: 4706: 4700: 4699:Dajani, Karma 4696: 4692: 4688: 4684: 4680: 4676: 4672: 4671: 4666: 4665:Salomaa, Arto 4662: 4658: 4654: 4649: 4645: 4641: 4640: 4635: 4631: 4627: 4626:Bailey, D. H. 4623: 4620:on 2008-11-23 4616: 4612: 4608: 4604: 4600: 4596: 4592: 4591: 4583: 4579: 4575: 4574:Bailey, D. H. 4571: 4570: 4558: 4553: 4549: 4545: 4541: 4537: 4536: 4531: 4527: 4523: 4519: 4515: 4511: 4507: 4503: 4498: 4494: 4490: 4486: 4482: 4479: 4475: 4471: 4467: 4463: 4459: 4455: 4451: 4447: 4442: 4438: 4434: 4430: 4426: 4422: 4418: 4413: 4409: 4405: 4404: 4399: 4395: 4391: 4388: 4382: 4378: 4373: 4370: 4366: 4362: 4358: 4354: 4350: 4345: 4340: 4336: 4332: 4331: 4325: 4322: 4318: 4313: 4308: 4304: 4300: 4299: 4294: 4289: 4286: 4282: 4278: 4276:0-8218-3387-1 4272: 4268: 4264: 4260: 4256: 4252: 4248: 4245: 4241: 4236: 4231: 4227: 4223: 4222: 4217: 4213: 4212:Davenport, H. 4209: 4205: 4200: 4196: 4192: 4191: 4186: 4182: 4178: 4175: 4171: 4167: 4163: 4162: 4157: 4153: 4149: 4144: 4140: 4136: 4132: 4128: 4125: 4121: 4117: 4111: 4107: 4103: 4098: 4094: 4089: 4084: 4079: 4075: 4071: 4066: 4063: 4059: 4055: 4051: 4047: 4043: 4042: 4037: 4033: 4030: 4026: 4022: 4020:9781118122372 4016: 4012: 4007: 4004: 4000: 3996: 3992: 3988: 3984: 3980: 3976: 3973: 3967: 3963: 3962: 3956: 3952: 3947: 3943: 3939: 3935: 3931: 3924: 3919: 3916: 3912: 3908: 3904: 3900: 3896: 3889: 3885: 3881: 3880:Bailey, D. H. 3877: 3874: 3870: 3865: 3860: 3856: 3852: 3848: 3844: 3840: 3836: 3832: 3828: 3824: 3821: 3817: 3813: 3809: 3808: 3802: 3799: 3795: 3791: 3785: 3781: 3777: 3773: 3768: 3767: 3758: 3755: 3753: 3750: 3748: 3745: 3743: 3740: 3739: 3727: 3722: 3720: 3713:, p. 89. 3712: 3707: 3700: 3695: 3688: 3687:Agafonov 1968 3683: 3676: 3671: 3664: 3659: 3652: 3647: 3640: 3635: 3628: 3623: 3616: 3611: 3595: 3580: 3574:, p. 92. 3573: 3568: 3566: 3558: 3553: 3551: 3543: 3538: 3531: 3526: 3519: 3514: 3512: 3505:, p. 79. 3504: 3499: 3493:, p. 78. 3492: 3487: 3480: 3476: 3470: 3463: 3458: 3451: 3446: 3439: 3433: 3429: 3421: 3400: 3397: 3394: 3389: 3383: 3379: 3375: 3371: 3361: 3356: 3343: 3340: 3337: 3328: 3325: 3320: 3315: 3311: 3307: 3304: 3301: 3298: 3294: 3288: 3285: 3282: 3277: 3274: 3271: 3267: 3261: 3258: 3245: 3232: 3230: 3226: 3203: 3200: 3197: 3191: 3187: 3182: 3178: 3173: 3163:the sequence 3162: 3159: 3155: 3145: 3143: 3139: 3133: 3131: 3127: 3125: 3116: 3110: 3109:. Therefore: 3108: 3100: 3096: 3092: 3088: 3084: 3060: 3054: 3048: 3023: 3020: 3017: 3012: 3000: 2994: 2988: 2969: 2956: 2952: 2949: 2945: 2941: 2937: 2933: 2929: 2913: 2910: 2905: 2892: 2884: 2881: 2873: 2869: 2865: 2861: 2857: 2853: 2850: 2846: 2842: 2838: 2819: 2813: 2807: 2787: 2781: 2775: 2769: 2763: 2752: 2739: 2735: 2732: 2684: 2680: 2676: 2673: 2670: 2665: 2661: 2637: 2634: 2631: 2625: 2620: 2616: 2607: 2588: 2585: 2582: 2576: 2525: 2524: 2521:finite-state 2518: 2514: 2513: 2512: 2509: 2506: 2502: 2489: 2485: 2481: 2478: 2462: 2456: 2453: 2448: 2444: 2440: 2435: 2431: 2424: 2421: 2413: 2397: 2394: 2389: 2385: 2381: 2376: 2372: 2368: 2363: 2359: 2350: 2346: 2343: 2339: 2336: 2332: 2328: 2324: 2320: 2316: 2312: 2308: 2290: 2280: 2277: 2269: 2265: 2261: 2258: 2254: 2250: 2246: 2242: 2238: 2234: 2230: 2226: 2222: 2218: 2214: 2210: 2207: 2203: 2199: 2183: 2178: 2174: 2168: 2164: 2158: 2154: 2150: 2142: 2138: 2135:are the base- 2122: 2119: 2114: 2110: 2106: 2101: 2097: 2093: 2088: 2084: 2061: 2057: 2053: 2042: 2039: 2036: 2033: 2030: 2024: 2021: 2008: 1992: 1989: 1986: 1978: 1957: 1954: 1946: 1943: 1927: 1924: 1921: 1913: 1909: 1905: 1901: 1898: 1880: 1870: 1867: 1859: 1858: 1857: 1849: 1847: 1842: 1825: 1822: 1817: 1814: 1811: 1808: 1805: 1802: 1799: 1793: 1789: 1786: 1783: 1776: 1773: 1771: 1763: 1760: 1756: 1747: 1742: 1738: 1734: 1729: 1725: 1720: 1717: 1713: 1708: 1702: 1699: 1694: 1691: 1687: 1682: 1676: 1673: 1668: 1665: 1661: 1656: 1650: 1647: 1642: 1639: 1635: 1630: 1624: 1621: 1616: 1613: 1609: 1605: 1601: 1593: 1590: 1587: 1583: 1579: 1574: 1571: 1567: 1556: 1553: 1550: 1546: 1542: 1539: 1526: 1506: 1503: 1500: 1495: 1492: 1484: 1477: 1474: 1470: 1466: 1458: 1455: 1450: 1443: 1440: 1437: 1431: 1427: 1424: 1421: 1417: 1413: 1407: 1400: 1395: 1391: 1388: 1385: 1381: 1373: 1371: 1368:Martin ( 1366: 1364: 1360: 1350: 1341: 1338: 1333: 1329: 1325: 1321: 1311: 1309: 1305: 1301: 1297: 1292: 1290: 1286: 1282: 1277: 1261: 1256: 1251: 1243: 1239: 1235: 1231: 1229: 1225: 1221: 1217: 1213: 1209: 1201: 1199: 1195: 1191: 1187: 1183: 1179: 1175: 1170: 1168: 1164: 1160: 1156: 1148: 1146: 1142: 1138: 1134: 1130: 1126: 1122: 1118: 1114: 1110: 1103: 1099: 1095: 1090: 1088: 1084: 1080: 1077: and 1076: 1072: 1071:prime numbers 1064: 1063: 1058: 1055: 1047: 1046: 1042: 1040: 1036: 1032: 1028: 1023: 1020: 1016: 1012: 1008: 1004: 1000: 997:). Using the 996: 992: 982: 980: 976: 951: 949: 948:unit interval 945: 932:mod 1 : 906: 905: 900: 888: 887: 882: 877: 828: 794: 784: 780: 779:normal number 757: 731: 720: 694: 686: 677: 675: 663: 561: 538: 516: 507: 503: 498: 493: 486: 483: 480: 472: 468: 453: 440: 428: 386:in the first 385: 382:appears as a 342: 327: 324: 319: 314: 307: 304: 301: 293: 289: 274: 261: 260: 256: 255:simply normal 198: 188: 174: 160: 158: 157: 152: 146: 137: 133: 129: 125: 121: 117: 112: 110: 106: 101: 98: 94: 90: 84: 70: 59: 51: 44: 41: 37: 36:simply normal 33: 29: 22: 4859: 4796: 4787: 4751: 4744:Berndt, B.C. 4740:Harman, Glyn 4704: 4690: 4686: 4683:Calude, C.S. 4669: 4643: 4637: 4615:the original 4594: 4588: 4539: 4533: 4513: 4492: 4488: 4461: 4457: 4436: 4432: 4407: 4401: 4398:Shiokawa, I. 4376: 4344:math/0006089 4334: 4328: 4302: 4296: 4258: 4225: 4219: 4194: 4188: 4165: 4159: 4138: 4134: 4101: 4073: 4069: 4045: 4039: 4010: 3986: 3982: 3960: 3933: 3929: 3898: 3894: 3846: 3842: 3811: 3805: 3775: 3711:Bugeaud 2012 3706: 3694: 3682: 3670: 3658: 3651:Bugeaud 2012 3646: 3634: 3622: 3610: 3592:denotes the 3579: 3572:Bugeaud 2012 3557:Schmidt 1960 3542:Cassels 1959 3537: 3525: 3518:Bugeaud 2012 3503:Bugeaud 2012 3498: 3491:Bugeaud 2012 3486: 3469: 3457: 3445: 3432: 3359: 3357: 3233: 3157: 3153: 3151: 3134: 3122: 3120: 3114: 3104: 3090: 3086: 3082: 2954: 2950: 2947: 2931: 2927: 2871: 2867: 2863: 2855: 2844: 2840: 2836: 2737: 2733: 2730: 2605: 2520: 2516: 2510: 2498: 2483: 2476: 2411: 2348: 2347:A number is 2341: 2334: 2330: 2326: 2322: 2318: 2314: 2313:in its base 2310: 2306: 2267: 2263: 2248: 2244: 2240: 2236: 2232: 2228: 2224: 2220: 2216: 2201: 2197: 2140: 2136: 2006: 1976: 1941: 1911: 1907: 1903: 1896: 1855: 1843: 1703:152587890625 1527: 1374: 1367: 1356: 1312: 1303: 1293: 1288: 1284: 1280: 1275: 1264: 1259: 1254: 1249: 1241: 1237: 1233: 1227: 1223: 1219: 1215: 1211: 1208:integer part 1205: 1197: 1193: 1189: 1181: 1177: 1171: 1166: 1152: 1144: 1140: 1136: 1124: 1120: 1116: 1112: 1108: 1106: 1101: 1097: 1093: 1086: 1068: 1059: 1051: 1043: 1029:, is also a 1024: 988: 978: 974: 952: 902: 898: 884: 878: 857:. For bases 795: 782: 778: 777:is called a 752: 726: 714:in the base 678: 539: 441: 426: 343: 262: 254: 171:be a finite 166: 154: 136:uncomputable 128:constructive 113: 108: 104: 102: 96: 85: 65: 35: 25: 4510:Wall, D. D. 4495:: 125–132, 4425:Schmidt, W. 4048:: 247–271, 3989:: 146–156, 3814:: 324–325, 3615:Martin 2001 3479:Kleene star 1979:(for every 1129:Besicovitch 1027:uncountable 886:rich number 693:real number 662:probability 163:Definitions 32:real number 28:mathematics 4874:Categories 4837:1130.11041 4770:1062.11052 4748:Boston, N. 4733:1033.11040 4661:Calude, C. 4526:Lempel, A. 4369:1036.11035 4321:0080.03604 4285:1033.11006 4141:: 95–101, 4124:1260.11001 3864:2292/10566 3820:0242.94040 3798:1271.11073 3763:References 3477:; is the 3089:digits of 2951:compresses 2843:digits of 2523:martingale 2344:normality. 1852:Properties 1337:irrational 1186:polynomial 1079:Paul Erdős 1019:computable 1003:almost all 560:asymptotic 348:. Now let 116:almost all 4861:MathWorld 4394:Nakai, Y. 4228:: 58–63, 4216:Erdős, P. 4185:Erdős, P. 4078:CiteSeerX 4062:184479669 4036:Borel, E. 4029:780289503 4003:123025145 3675:Long 1957 3663:Wall 1949 3450:Beck 2009 3406:∞ 3380:β 3341:≥ 3302:π 3286:− 3268:∑ 3252:∞ 3249:→ 3209:∞ 3152:A number 3058:↾ 2998:↾ 2976:∞ 2973:→ 2911:× 2906:∗ 2902:Σ 2898:→ 2893:∗ 2889:Σ 2817:↾ 2785:∞ 2773:↾ 2759:∞ 2756:→ 2712:Σ 2677:− 2626:∈ 2574:Σ 2554:Σ 2534:Σ 2457:… 2425:∈ 2398:⋯ 2281:∈ 2247:block is 2235:block in 2184:… 2123:… 2062:α 2054:≥ 2037:… 2025:∩ 1987:α 1958:⊆ 1925:⋅ 1871:⊆ 1826:… 1794:⏟ 1787:… 1761:… 1721:− 1695:− 1669:− 1643:− 1617:− 1575:− 1562:∞ 1547:∏ 1540:α 1481:∞ 1467:∩ 1459:∈ 1441:− 1425:− 1302:class of 1279:≥ 0, and 1252:+ ... + α 1115:) is the 829:(so that 460:∞ 457:→ 384:substring 344:for each 281:∞ 278:→ 187:sequences 179:-digits, 4779:(2006), 4667:(eds.), 4632:(2006), 4580:(2001), 4528:(1978), 4512:(1949), 4478:31943843 4427:(1960), 4244:14621341 3886:(2002), 3873:17273684 3736:See also 3107:converse 2734:succeeds 2519:(a.k.a. 2479:-normal. 2414:for all 2270:for all 1291:> 0. 1039:comeagre 1031:null set 889:in base 827:rational 419:, 8) = 3 401:01010101 358:and let 173:alphabet 60: 1/ 4611:2694690 4522:Ziv, J. 4361:2695618 3915:8944421 3124:entropy 1344:√ 1316:√ 1131: ( 1104:(3)..., 1081: ( 1009: ( 993: ( 962:⁄ 946:in the 904:lexicon 685:integer 655:⁄ 613:⁄ 587:⁄ 405:, then 257:if the 197:strings 141:√ 40:integer 4835:  4825:  4768:  4758:  4731:  4721:  4609:  4476:  4383:  4367:  4359:  4319:  4283:  4273:  4242:  4122:  4112:  4080:  4060:  4027:  4017:  4001:  3968:  3913:  3871:  3818:  3796:  3786:  3093:. The 3036:where 2800:where 2488:finite 2215:every 2076:) and 1330:, and 1269:> β 1240:) = α· 1203:0...., 1107:where 871:/ log 821:/ log 683:is an 674:random 646:, and 604:, and 548:| 542:| 540:where 427:normal 199:. Let 153:, and 105:normal 93:base 6 89:binary 50:digits 38:in an 4805:arXiv 4784:(PDF) 4618:(PDF) 4607:S2CID 4585:(PDF) 4474:S2CID 4357:JSTOR 4339:arXiv 4240:S2CID 4058:S2CID 3999:S2CID 3926:(PDF) 3911:S2CID 3891:(PDF) 3869:S2CID 3590:mod 1 3424:Notes 3097:(the 2934:, is 2847:(see 2217:block 1977:dense 1790:99999 1784:99999 1328:ln(2) 944:dense 865:with 815:with 691:is a 259:limit 4823:ISBN 4756:ISBN 4719:ISBN 4381:ISBN 4271:ISBN 4110:ISBN 4025:OCLC 4015:ISBN 3966:ISBN 3784:ISBN 3126:rate 3018:< 2395:< 2382:< 2369:< 2257:2005 2253:1978 1990:< 1910:and 1370:2001 1296:2002 1174:1992 1163:1952 1143:) = 1133:1935 1083:1946 1060:The 1015:2002 1011:1917 995:1909 867:log 861:and 839:and 817:log 811:and 578:and 217:let 167:Let 97:will 43:base 30:, a 4833:Zbl 4815:doi 4766:Zbl 4729:Zbl 4648:doi 4644:134 4599:doi 4552:hdl 4544:doi 4497:doi 4466:doi 4441:doi 4412:doi 4365:Zbl 4349:doi 4335:108 4317:Zbl 4307:doi 4281:Zbl 4230:doi 4199:doi 4170:doi 4143:doi 4120:Zbl 4088:doi 4074:349 4050:doi 3991:doi 3946:hdl 3938:doi 3934:270 3903:doi 3859:hdl 3851:doi 3816:Zbl 3794:Zbl 3596:of 3242:lim 3223:is 2942:or 2936:1–1 2239:is 1975:is 1947:If 1902:If 1818:559 1812:291 1806:747 1357:No 1244:+ α 1210:of 1100:(2) 1096:(1) 977:or 942:is 805:≥ 2 751:is 725:is 710:of 648:111 644:110 640:101 636:100 632:011 628:010 624:001 620:000 574:), 450:lim 425:is 421:.) 417:010 403:... 271:lim 253:is 213:in 175:of 120:set 26:In 4876:: 4858:. 4831:, 4821:, 4813:, 4786:, 4764:, 4746:; 4727:, 4717:, 4709:, 4691:54 4689:, 4673:, 4642:, 4636:, 4628:; 4605:, 4595:10 4593:, 4587:, 4576:; 4550:, 4540:24 4538:, 4532:, 4524:; 4493:45 4491:, 4472:, 4460:, 4437:10 4435:, 4431:, 4408:62 4406:, 4396:; 4363:, 4355:, 4347:, 4333:, 4315:, 4301:, 4295:, 4279:, 4269:, 4265:: 4253:; 4238:, 4224:, 4214:; 4195:52 4193:, 4183:; 4164:, 4137:, 4118:, 4108:, 4086:, 4072:, 4056:, 4046:27 4044:, 4023:, 3997:, 3987:39 3985:, 3944:, 3932:, 3928:, 3909:, 3899:11 3897:, 3893:, 3882:; 3867:, 3857:, 3847:21 3845:, 3841:, 3833:; 3829:; 3810:, 3792:, 3718:^ 3564:^ 3549:^ 3510:^ 3344:1. 2957:if 2870:, 2854:A 2851:). 2515:A 2259:). 2151:0. 2009:, 1800:23 1743:15 1677:64 1365:. 1326:, 1322:, 1310:. 1147:, 1127:. 1092:0. 950:. 936:∈ 879:A 844:= 834:= 767:, 741:, 704:, 676:. 642:, 638:, 634:, 630:, 626:, 622:, 618:; 606:11 602:10 600:, 598:01 596:, 594:00 592:; 439:, 434:∈ 399:= 372:, 231:, 204:∈ 147:, 83:. 4864:. 4817:: 4807:: 4650:: 4601:: 4554:: 4546:: 4499:: 4468:: 4462:1 4443:: 4414:: 4351:: 4341:: 4309:: 4303:7 4232:: 4226:4 4201:: 4172:: 4166:8 4145:: 4139:7 4090:: 4052:: 3993:: 3948:: 3940:: 3905:: 3861:: 3853:: 3812:9 3701:. 3689:. 3677:. 3665:. 3641:. 3629:. 3617:. 3605:. 3602:b 3599:x 3588:b 3585:x 3559:. 3544:. 3481:. 3464:. 3452:. 3401:0 3398:= 3395:k 3390:) 3384:k 3376:x 3372:( 3360:x 3338:m 3329:0 3326:= 3321:x 3316:k 3312:b 3308:m 3305:i 3299:2 3295:e 3289:1 3283:n 3278:0 3275:= 3272:k 3262:n 3259:1 3246:n 3204:0 3201:= 3198:k 3192:) 3188:x 3183:k 3179:b 3174:( 3158:b 3154:x 3091:S 3087:n 3083:C 3068:| 3064:) 3061:n 3055:S 3052:( 3049:C 3045:| 3024:, 3021:1 3013:n 3008:| 3004:) 3001:n 2995:S 2992:( 2989:C 2985:| 2970:n 2955:S 2948:C 2932:C 2928:C 2914:Q 2885:: 2882:f 2872:C 2868:Q 2864:C 2845:S 2841:n 2837:d 2823:) 2820:n 2814:S 2811:( 2808:d 2788:, 2782:= 2779:) 2776:n 2770:S 2767:( 2764:d 2753:n 2738:S 2731:d 2716:| 2708:| 2685:0 2681:q 2674:1 2671:= 2666:1 2662:q 2641:] 2638:1 2635:, 2632:0 2629:[ 2621:0 2617:q 2606:q 2592:} 2589:1 2586:, 2583:0 2580:{ 2577:= 2477:b 2463:. 2460:} 2454:, 2449:2 2445:m 2441:, 2436:1 2432:m 2428:{ 2422:m 2412:b 2390:3 2386:m 2377:2 2373:m 2364:1 2360:m 2349:b 2342:b 2335:b 2331:k 2327:b 2323:b 2319:n 2315:b 2311:k 2307:n 2291:+ 2286:Z 2278:k 2268:b 2264:b 2249:S 2245:k 2241:S 2237:S 2233:k 2229:k 2225:k 2221:k 2202:b 2198:A 2179:3 2175:a 2169:2 2165:a 2159:1 2155:a 2141:A 2137:b 2120:, 2115:3 2111:a 2107:, 2102:2 2098:a 2094:, 2089:1 2085:a 2058:n 2050:| 2046:} 2043:n 2040:, 2034:, 2031:1 2028:{ 2022:A 2018:| 2007:n 1993:1 1962:N 1955:A 1944:. 1942:b 1928:a 1922:x 1912:a 1908:b 1904:x 1897:X 1881:+ 1876:R 1868:X 1815:, 1809:, 1803:, 1774:= 1764:= 1757:) 1748:) 1739:5 1735:( 1730:6 1726:1 1718:1 1714:( 1709:) 1700:1 1692:1 1688:( 1683:) 1674:1 1666:1 1662:( 1657:) 1651:9 1648:1 1640:1 1636:( 1631:) 1625:4 1622:1 1614:1 1610:( 1606:= 1602:) 1594:) 1591:m 1588:( 1584:f 1580:1 1572:1 1568:( 1557:2 1554:= 1551:m 1543:= 1507:2 1504:= 1501:n 1496:, 1493:4 1485:) 1478:, 1475:3 1471:[ 1463:Z 1456:n 1451:, 1444:1 1438:n 1432:) 1428:1 1422:n 1418:( 1414:f 1408:n 1401:{ 1396:= 1392:) 1389:n 1386:( 1382:f 1346:2 1332:e 1324:π 1318:2 1304:b 1289:x 1285:x 1283:( 1281:f 1276:d 1271:2 1267:1 1262:, 1260:x 1258:· 1255:d 1250:x 1248:· 1246:1 1242:x 1238:x 1236:( 1234:f 1228:f 1224:b 1220:b 1216:n 1214:( 1212:f 1198:x 1194:x 1192:( 1190:f 1182:x 1180:( 1178:f 1167:f 1145:n 1141:n 1139:( 1137:f 1125:b 1121:b 1117:n 1113:n 1111:( 1109:f 1102:f 1098:f 1094:f 1087:b 971:b 965:b 960:1 955:b 940:} 938:N 934:n 930:b 927:x 925:{ 921:b 917:x 913:b 909:b 895:b 891:b 873:s 869:r 863:s 859:r 855:s 851:r 846:b 842:s 836:b 832:r 823:s 819:r 813:s 809:r 803:b 798:b 791:b 787:b 775:x 769:b 765:x 761:S 755:b 749:x 743:b 739:x 735:S 729:b 723:x 716:b 712:x 706:b 702:x 698:S 689:x 681:b 670:S 666:w 657:8 653:1 615:4 611:1 589:2 585:1 580:1 576:0 572:} 570:1 568:, 566:0 564:{ 556:S 552:w 545:w 521:| 517:w 513:| 508:b 504:1 499:= 494:n 490:) 487:n 484:, 481:w 478:( 473:S 469:N 454:n 436:Σ 432:w 423:S 415:( 412:S 408:N 397:S 392:S 388:n 380:w 376:) 374:n 370:w 368:( 365:S 361:N 355:Σ 350:w 346:a 328:b 325:1 320:= 315:n 311:) 308:n 305:, 302:a 299:( 294:S 290:N 275:n 251:S 247:S 243:n 239:a 235:) 233:n 229:a 227:( 224:S 220:N 215:Σ 211:a 206:Σ 202:S 192:Σ 182:Σ 177:b 169:Σ 156:e 150:π 143:2 81:b 77:n 73:n 68:b 62:b 54:b 46:b 23:.

Index

normal number (computing)
mathematics
real number
integer
base
digits
natural density
binary
base 6
almost all
set
Lebesgue measure
constructive
Chaitin's constant
uncomputable
2
π
e
alphabet
sequences
strings
limit
substring
asymptotic
probability
random
integer
real number
positional number system
rational

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.