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Hausdorff dimension

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1607: 2369: 1644: 1449: 199: 3969: 20: 31:, where after each iteration, all original line segments are replaced with four, each a self-similar copy that is 1/3 the length of the original. One formalism of the Hausdorff dimension uses the scale factor (S = 3) and the number of self-similar objects (N = 4) to calculate the dimension, D, after the first iteration to be D = (log N)/(log S) = (log 4)/(log 3) ≈ 1.26. 703: 1363: 173:
triangle that points outward, and this base segment is then deleted to leave a final object from the iteration of unit length of 4. That is, after the first iteration, each original line segment has been replaced with N=4, where each self-similar copy is 1/S = 1/3 as long as the original. Stated
2318: 533: 397:, sets with noninteger Hausdorff dimensions, are found everywhere in nature. He observed that the proper idealization of most rough shapes you see around you is not in terms of smooth idealized shapes, but in terms of fractal idealized shapes: 2203: 286:
Every space-filling curve hits some points multiple times and does not have a continuous inverse. It is impossible to map two dimensions onto one in a way that is continuous and continuously invertible. The topological dimension, also called
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another way, we have taken an object with Euclidean dimension, D, and reduced its linear scale by 1/3 in each direction, so that its length increases to N=S. This equation is easily solved for D, yielding the ratio of logarithms (or
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But topological dimension is a very crude measure of the local size of a space (size near a point). A curve that is almost space-filling can still have topological dimension one, even if it fills up most of the area of a region. A
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is a union of three copies of itself, each copy shrunk by a factor of 1/2; this yields a Hausdorff dimension of ln(3)/ln(2) ≈ 1.58. These Hausdorff dimensions are related to the "critical exponent" of the
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shown at right is constructed from an equilateral triangle; in each iteration, its component line segments are divided into 3 segments of unit length, the newly created middle segment is used as the base of a new
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For shapes that are smooth, or shapes with a small number of corners, the shapes of traditional geometry and science, the Hausdorff dimension is an integer agreeing with the topological dimension. But
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is 3. That is, for sets of points that define a smooth shape or a shape that has a small number of corners—the shapes of traditional geometry and science—the Hausdorff dimension is an
2110: 1440:). The Hausdorff measure and the Hausdorff content can both be used to determine the dimension of a set, but if the measure of the set is non-zero, their actual values may disagree. 1971:
points in has Hausdorff dimension zero and Minkowski dimension one. There are also compact sets for which the Minkowski dimension is strictly larger than the Hausdorff dimension.
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is the number of independent parameters one needs to pick out a unique point inside. However, any point specified by two parameters can be instead specified by one, because the
1501: 1074: 525: 1407: 2118: 487: 82:. However, formulas have also been developed that allow calculation of the dimension of other less simple objects, where, solely on the basis of their properties of 1548: 1358:{\displaystyle C_{H}^{d}(S):=H_{\infty }^{d}(S)=\inf \left\{\sum _{k=1}^{\infty }(\operatorname {diam} U_{k})^{d}:\bigcup _{k=1}^{\infty }U_{k}\supseteq S\right\}} 1568:, is a union of two copies of itself, each copy shrunk by a factor 1/3; hence, it can be shown that its Hausdorff dimension is ln(2)/ln(3) ≈ 0.63. The 2446: 1829: 1521: 1186: 1162: 1134: 1114: 1094: 929: 857: 750: 730: 457: 937: 2323:
This inequality can be strict. It is possible to find two sets of dimension 0 whose product has dimension 1. In the opposite direction, it is known that when
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performed detailed experiments to measure the approximate Hausdorff dimension for various coastlines. His results have varied from 1.02 for the coastline of
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has the construction of the Hausdorff measure where the covering sets are allowed to have arbitrarily large sizes (Here, we use the standard convention that
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Gneiting, Tilmann; Ševčíková, Hana; Percival, Donald B. (2012). "Estimators of Fractal Dimension: Assessing the Roughness of Time Series and Spatial Data".
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is yet another similar notion which gives the same value for many shapes, but there are well-documented exceptions where all these dimensions differ.
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Clouds are not spheres, mountains are not cones, coastlines are not circles, and bark is not smooth, nor does lightning travel in a straight line.
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has an integer topological dimension, but in terms of the amount of space it takes up, it behaves like a higher-dimensional space.
3202:(workshop), Society for Chaos Theory in Psychology and the Life Sciences annual meeting, June 28, 1996, Berkeley, California, see 3076: 1574: 2681: 3253: 2313:{\displaystyle \dim _{\operatorname {Haus} }(X\times Y)\geq \dim _{\operatorname {Haus} }(X)+\dim _{\operatorname {Haus} }(Y).} 386:
is a critical boundary between growth rates that are insufficient to cover the space, and growth rates that are overabundant.
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is similar to, and at least as large as, the Hausdorff dimension, and they are equal in many situations. However, the set of
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allowing computation of dimensions for highly irregular or "rough" sets, this dimension is also commonly referred to as the
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involving interweaving the digits of two numbers to yield a single number encoding the same information). The example of a
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Larry Riddle, 2014, "Classic Iterated Function Systems: Koch Snowflake", Agnes Scott College e-Academy (online), see
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Many sets defined by a self-similarity condition have dimensions which can be determined explicitly. Roughly, a set
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The Hausdorff dimension measures the local size of a space taking into account the distance between points, the
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Farkas, Abel; Fraser, Jonathan (30 July 2015). "On the equality of Hausdorff measure and Hausdorff content".
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Dodson, M. Maurice; Kristensen, Simon (June 12, 2003). "Hausdorff Dimension and Diophantine Approximation".
3085:, another variation of fractal dimension that, like Hausdorff dimension, is defined using coverings by balls 279:(taking one real number into a pair of real numbers in a way so that all pairs of numbers are covered) and 3988: 3127: 2629: 288: 3669: 3379: 1477: 1041: 492: 4202: 3886: 109: 108:, i.e. a set where the distances between all members are defined. The dimension is drawn from the 2198:{\displaystyle \dim _{\operatorname {Haus} }(X)=\sup _{i\in I}\dim _{\operatorname {Haus} }(X_{i}).} 4197: 3923: 3863: 427:
The formal definition of the Hausdorff dimension is arrived at by defining first the d-dimensional
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This Knowledge article also discusses further useful characterizations of the Hausdorff dimension.
3067:. Under the same conditions as the previous theorem, the unique fixed point of ψ is self-similar. 1371: 4131: 4126: 4106: 3872: 2781: 2379: 1654: 209: 144:
In mathematical terms, the Hausdorff dimension generalizes the notion of the dimension of a real
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The Hausdorff dimension is a successor to the simpler, but usually equivalent, box-counting or
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around some point. Then the unique fixed point of ψ is a set whose Hausdorff dimension is
2518:{\displaystyle \psi _{i}:\mathbf {R} ^{n}\rightarrow \mathbf {R} ^{n},\quad i=1,\ldots ,m} 1896:{\displaystyle \inf _{Y}\dim _{\operatorname {Haus} }(Y)=\dim _{\operatorname {ind} }(X),} 8: 3993: 3848: 3360: 3302:
Schleicher, Dierk (June 2007). "Hausdorff Dimension, Its Properties, and Its Surprises".
3088: 2529: 2052: 1964: 1714: 1588: 1578: 1569: 1457: 1024:{\displaystyle \dim _{\operatorname {H} }{(X)}:=\inf\{d\geq 0:{\mathcal {H}}^{d}(X)=0\}.} 276: 272: 153: 79: 3637: 3542: 3415: 4172: 4013: 3968: 3804: 3709: 3649: 3564: 3528: 3427: 3337: 3311: 3279: 3166: 3148: 2649: 2637: 1506: 1171: 1147: 1119: 1099: 1079: 914: 842: 836: 735: 715: 442: 331: 83: 3584: 4192: 4008: 3808: 3754: 3721: 3713: 3687: 3673: 3653: 3594: 3568: 3554: 3465: 3431: 3329: 3232: 3225: 3220: 3098: 3093: 3082: 3058: 3054: 2425:
is self-similar if it is the fixed point of a set-valued transformation ψ, that is ψ(
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are non-empty metric spaces, then the Hausdorff dimension of their product satisfies
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More specifically, the Hausdorff dimension is a dimensional number associated with a
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is self-similar if and only if the intersections satisfy the following condition:
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which is defined recursively. It is always an integer (or +∞) and is denoted dim
4065: 4050: 3834: 3817: 3741: 3661: 3527:. Proceedings of Symposia in Pure Mathematics. Vol. 72. pp. 305–347. 3503: 3486: 1813:{\displaystyle \dim _{\mathrm {Haus} }(X)\geq \dim _{\operatorname {ind} }(X).} 165: 28: 3800: 3645: 3423: 2857:
The contraction coefficient of a similitude is the magnitude of the dilation.
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The open set condition is a separation condition that ensures the images ψ
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MacGregor Campbell, 2013, "5.6 Scaling and the Hausdorff Dimension," at
4155: 4035: 3792: 3705: 2393: in this section. Unsourced material may be challenged and removed. 1668: in this section. Unsourced material may be challenged and removed. 1561: 260: 223: in this section. Unsourced material may be challenged and removed. 3867: 3162: 3061:(the intersections are just points), but is also true more generally: 4136: 4045: 3958: 3909: 3533: 3316: 2632:
applied to the complete metric space of non-empty compact subsets of
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Marstrand, J. M. (1954). "The dimension of cartesian product sets".
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Marstrand, J. M. (1954). "The dimension of Cartesian product sets".
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in dimension 2 and above is conjectured to be Hausdorff dimension 2.
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Fractal Geometry and Applications: A Jubilee of Benoît Mandelbrot
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Examples of deterministic fractals, random and natural fractals.
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often are spaces whose Hausdorff dimension strictly exceeds the
752:. The Hausdorff d-dimensional outer measure is then defined as 67: 1958: 1696: 78:
agreeing with the usual sense of dimension, also known as the
4027: 3720: 3690:(1929). "On Linear Sets of Points of Fractional Dimensions". 2658:(in certain cases), we need a technical condition called the 1974: 3878: 275:
shows that one can even map the real line to the real plane
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can have noninteger Hausdorff dimensions. For instance, the
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Fractal Geometry: Mathematical Foundations and Applications
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Fractal geometry. Mathematical foundations and applications
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Fractal Geometry: Mathematical Foundations and Applications
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Keith Clayton, 1996, "Fractals and the Fractal Dimension,"
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have the same Hausdorff dimension as the space they fill.
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is infinite (except that when this latter set of numbers
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The intuitive concept of dimension of a geometric object
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have the same underlying set of points and the metric
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by small open balls there is at least one point where
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Several selections from this volume are reprinted in
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For fractals that occur in nature, the Hausdorff and
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is bounded from above by the Hausdorff dimension of
1633: 58:. For instance, the Hausdorff dimension of a single 3449:. John Wiley & Sons, Inc., Hoboken, New Jersey. 2654:To determine the dimension of the self-similar set 2208:This can be verified directly from the definition. 3224: 3111: 3030: 2937: 2846: 2736: 2612: 2517: 2312: 2197: 2104: 1895: 1812: 1542: 1515: 1495: 1431: 1401: 1357: 1180: 1156: 1128: 1108: 1088: 1068: 1023: 923: 903: 851: 827: 744: 724: 697: 519: 481: 451: 378:approaches zero. More precisely, this defines the 133: 23:Example of non-integer dimensions. The first four 3686: 3666:Geometry of sets and measures in Euclidean spaces 3194: 3192: 2770:. Suppose the open set condition holds and each ψ 2747:where the sets in union on the left are pairwise 2613:{\displaystyle A=\bigcup _{i=1}^{m}\psi _{i}(A).} 4184: 3748: 3522: 3401: 2433:, although the exact definition is given below. 2148: 1834: 1417: 1252: 968: 786: 564: 3575: 3459: 2355:. These facts are discussed in Mattila (1995). 904:{\displaystyle \dim _{\operatorname {H} }{(X)}} 362:, the Hausdorff dimension is the unique number 3200:Basic Concepts in Nonlinear Dynamics and Chaos 3189: 3894: 3464:. Cambridge, UK: Cambridge University Press. 3252:Briggs, Jimmy; Tyree, Tim (3 December 2016). 2776:is a similitude, that is a composition of an 1951:These results were originally established by 3768: 3593: 3297: 3295: 3277: 3215: 3213: 3211: 1015: 971: 3251: 2847:{\displaystyle \sum _{i=1}^{m}r_{i}^{s}=1.} 1959:Hausdorff dimension and Minkowski dimension 1697:Hausdorff dimension and inductive dimension 1136:is empty the Hausdorff dimension is zero). 3901: 3887: 3815: 3730:Journal of the London Mathematical Society 3484: 3301: 3219: 2864:which is carried onto itself by a mapping 1975:Hausdorff dimensions and Frostman measures 1610:Estimating the Hausdorff dimension of the 134:{\displaystyle {\overline {\mathbb {R} }}} 3833: 3728:(1937). "Sets of Fractional Dimensions". 3623: 3614: 3532: 3502: 3315: 3292: 3283: 3208: 3152: 3124:Annenberg Learner:MATHematics illuminated 2643: 2409:Learn how and when to remove this message 1684:Learn how and when to remove this message 1483: 1432:{\displaystyle \inf \varnothing =\infty } 431:, a fractional-dimension analogue of the 239:Learn how and when to remove this message 148:. That is, the Hausdorff dimension of an 122: 3842: 3444: 3354: 2105:{\displaystyle X=\bigcup _{i\in I}X_{i}} 1605: 1447: 835:, and the restriction of the mapping to 18: 3660: 3460:Falconer, K. J. (1985). "Theorem 8.3". 3373: 3077:List of fractals by Hausdorff dimension 2662:(OSC) on the sequence of contractions ψ 2630:contractive mapping fixed point theorem 4185: 862: 839:justifies it as a measure, called the 16:Invariant measure of fractal dimension 3882: 2112:is a finite or countable union, then 2391:adding citations to reliable sources 2362: 2358: 2051:. A partial converse is provided by 1666:adding citations to reliable sources 1637: 1139: 416: 221:adding citations to reliable sources 192: 3057:. This is clear in the case of the 2059:Behaviour under unions and products 712:is taken over all countable covers 358:. For a sufficiently well-behaved 263:is equal to the cardinality of the 13: 3515: 1764: 1761: 1758: 1755: 1566:zero-dimensional topological space 1426: 1329: 1276: 1230: 1096:-dimensional Hausdorff measure of 1060: 989: 946: 882: 762: 641: 588: 511: 14: 4214: 3857: 3304:The American Mathematical Monthly 1634:Properties of Hausdorff dimension 1420: 51:, that was introduced in 1918 by 3967: 2675:with compact closure, such that 2480: 2465: 2367: 1642: 1496:{\displaystyle \mathbb {R} ^{n}} 1069:{\displaystyle d\in [0,\infty )} 859:-dimensional Hausdorff Measure. 520:{\displaystyle d\in [0,\infty )} 197: 100:Hausdorff–Besicovitch dimension. 3478: 3453: 3438: 3395: 3386: 3367: 2543:< 1. Then there is a unique 2493: 2378:needs additional citations for 1939:is topologically equivalent to 1653:needs additional citations for 295:such that in every covering of 208:needs additional citations for 3875:at Encyclopedia of Mathematics 3818:"Fractals and self similarity" 3487:"Fractals and self similarity" 3348: 3326:10.1080/00029890.2007.11920440 3271: 3245: 3227:The Fractal Geometry of Nature 3177: 3132: 3045:is the Hausdorff dimension of 3011: 3005: 2989: 2983: 2932: 2926: 2889: 2883: 2877: 2722: 2716: 2604: 2598: 2475: 2304: 2298: 2279: 2273: 2254: 2242: 2189: 2176: 2141: 2135: 1887: 1881: 1862: 1856: 1804: 1798: 1779: 1773: 1625:to 1.25 for the west coast of 1396: 1390: 1301: 1281: 1246: 1240: 1219: 1213: 1063: 1051: 1006: 1000: 961: 955: 897: 891: 822: 816: 793: 779: 773: 613: 593: 558: 552: 514: 502: 96:Abram Samoilovitch Besicovitch 1: 3908: 3589:. Princeton University Press. 3445:Falconer, Kenneth J. (2003). 3104: 2764:) do not overlap "too much". 2335:, the Hausdorff dimension of 183:Minkowski–Bouligand dimension 3816:Hutchinson, John E. (1981). 3485:Hutchinson, John E. (1981). 3462:The Geometry of Fractal Sets 1402:{\displaystyle C_{H}^{d}(S)} 354:) grows polynomially with 1/ 188: 126: 7: 3868:Encyclopedia of Mathematics 3774:"Dimension und äußeres Maß" 3626:Proc. Cambridge Philos. Soc 3599:"La dimension et la mesure" 3551:10.1090/pspum/072.1/2112110 3404:Proc. Cambridge Philos. Soc 3070: 1468:have Hausdorff dimension 0. 1443: 1166:unlimited Hausdorff content 289:Lebesgue covering dimension 10: 4219: 3843:Falconer, Kenneth (2003). 3835:10.1512/iumj.1981.30.30055 3753:. Boston: Addison-Wesley. 3670:Cambridge University Press 3504:10.1512/iumj.1981.30.30055 3380:Cambridge University Press 3355:Falconer, Kenneth (2003). 3259:. University of Washington 2792:is the unique solution of 2647: 2536:with contraction constant 2023:> 0 and for every ball 1987:subsets of a metric space 1910:ranges over metric spaces 1550:has Hausdorff dimension 1. 482:{\displaystyle S\subset X} 420: 4169: 4148: 4084: 4022: 3976: 3965: 3916: 3749:Edgar, Gerald A. (1993). 3646:10.1017/S0305004100029236 3424:10.1017/S0305004100029236 2624:The theorem follows from 1709:metric space. There is a 3742:10.1112/jlms/s1-12.45.18 3205:, accessed 5 March 2015. 3186:, accessed 5 March 2015. 3129:, accessed 5 March 2015. 2019:holds for some constant 1503:has Hausdorff dimension 1034:This is the same as the 267:(this can be seen by an 47:, or more specifically, 3603:Fundamenta Mathematicae 3374:Morters, Peres (2010). 2349:upper packing dimension 1452:Dimension of a further 3053:denotes s-dimensional 3032: 2939: 2915: 2848: 2822: 2738: 2705: 2644:The open set condition 2622: 2614: 2587: 2519: 2314: 2199: 2106: 1897: 1814: 1614: 1612:coast of Great Britain 1583:analysis of algorithms 1544: 1517: 1497: 1461: 1433: 1403: 1359: 1333: 1280: 1182: 1158: 1130: 1110: 1090: 1070: 1025: 925: 905: 853: 829: 746: 726: 699: 645: 592: 521: 483: 453: 407:box-counting dimension 403: 380:box-counting dimension 322:. Consider the number 135: 32: 3822:Indiana Univ. Math. J 3781:Mathematische Annalen 3693:Mathematische Annalen 3616:10.4064/fm-28-1-81-89 3491:Indiana Univ. Math. J 3033: 2940: 2895: 2849: 2802: 2739: 2685: 2671:There is an open set 2615: 2567: 2520: 2435: 2331:are Borel subsets of 2315: 2200: 2107: 1898: 1815: 1609: 1558:topological dimension 1545: 1543:{\displaystyle S^{1}} 1518: 1498: 1451: 1434: 1404: 1360: 1313: 1260: 1183: 1159: 1131: 1111: 1091: 1071: 1026: 926: 906: 854: 830: 747: 727: 700: 625: 572: 522: 484: 454: 399: 136: 110:extended real numbers 80:topological dimension 22: 4085:Dimensions by number 3765:See chapters 9,10,11 3751:Classics on fractals 2955: 2871: 2799: 2682: 2558: 2447: 2387:improve this article 2226: 2119: 2067: 1830: 1746: 1739:is non-empty. Then 1662:improve this article 1619:Lewis Fry Richardson 1589:Space-filling curves 1579:recurrence relations 1527: 1507: 1478: 1414: 1372: 1195: 1172: 1148: 1120: 1100: 1080: 1042: 938: 915: 874: 843: 756: 736: 716: 534: 493: 467: 443: 439:is constructed: Let 217:improve this article 116: 3864:Hausdorff dimension 3849:John Wiley and Sons 3638:1954PCPS...50..198M 3543:2003math......5399D 3416:1954PCPS...50..198M 3361:John Wiley and Sons 3254:"Hausdorff Measure" 3141:Statistical Science 3089:Intrinsic dimension 2837: 1965:Minkowski dimension 1715:inductive dimension 1570:Sierpinski triangle 1560:. For example, the 1458:Sierpinski triangle 1389: 1239: 1212: 869:Hausdorff dimension 863:Hausdorff dimension 815: 551: 273:space-filling curve 154:inner product space 41:Hausdorff dimension 4014:Degrees of freedom 3917:Dimensional spaces 3801:10338.dmlcz/100363 3793:10.1007/BF01457179 3706:10.1007/BF01454831 3221:Mandelbrot, Benoît 3028: 2935: 2860:In general, a set 2844: 2823: 2734: 2660:open set condition 2650:Open set condition 2638:Hausdorff distance 2610: 2515: 2310: 2195: 2162: 2102: 2091: 1918:. In other words, 1893: 1842: 1810: 1615: 1598:The trajectory of 1540: 1513: 1493: 1462: 1429: 1399: 1375: 1355: 1225: 1198: 1178: 1154: 1126: 1106: 1086: 1066: 1021: 921: 901: 849: 825: 801: 800: 742: 722: 695: 537: 517: 479: 449: 338:required to cover 334:of radius at most 176:natural logarithms 131: 33: 4180: 4179: 3989:Lebesgue covering 3954:Algebraic variety 3873:Hausdorff measure 3722:A. S. Besicovitch 3688:A. S. Besicovitch 3679:978-0-521-65595-8 3163:10.1214/11-STS370 3099:Fractal dimension 3094:Packing dimension 3083:Assouad dimension 3059:Sierpinski gasket 3055:Hausdorff measure 2419: 2418: 2411: 2359:Self-similar sets 2147: 2076: 1833: 1694: 1693: 1686: 1523:, and the circle 1516:{\displaystyle n} 1181:{\displaystyle S} 1157:{\displaystyle d} 1140:Hausdorff content 1129:{\displaystyle d} 1109:{\displaystyle X} 1089:{\displaystyle d} 924:{\displaystyle X} 852:{\displaystyle d} 785: 745:{\displaystyle S} 725:{\displaystyle U} 452:{\displaystyle X} 429:Hausdorff measure 423:Hausdorff measure 417:Formal definition 411:packing dimension 391:Benoit Mandelbrot 342:completely. When 249: 248: 241: 129: 49:fractal dimension 4210: 4203:Dimension theory 3977:Other dimensions 3971: 3939:Projective space 3903: 3896: 3889: 3880: 3879: 3852: 3847:(2nd ed.). 3839: 3837: 3812: 3787:(1–2): 157–179. 3778: 3764: 3745: 3717: 3683: 3657: 3620: 3618: 3590: 3586:Dimension Theory 3577:Hurewicz, Witold 3572: 3536: 3509: 3508: 3506: 3482: 3476: 3475: 3457: 3451: 3450: 3442: 3436: 3435: 3399: 3393: 3390: 3384: 3383: 3371: 3365: 3364: 3359:(2nd ed.). 3352: 3346: 3345: 3319: 3299: 3290: 3289: 3287: 3275: 3269: 3268: 3266: 3264: 3258: 3249: 3243: 3242: 3230: 3217: 3206: 3196: 3187: 3181: 3175: 3174: 3156: 3136: 3130: 3120: 3037: 3035: 3034: 3029: 3018: 3014: 3004: 3003: 2982: 2981: 2967: 2966: 2944: 2942: 2941: 2936: 2925: 2924: 2914: 2909: 2853: 2851: 2850: 2845: 2836: 2831: 2821: 2816: 2743: 2741: 2740: 2735: 2715: 2714: 2704: 2699: 2619: 2617: 2616: 2611: 2597: 2596: 2586: 2581: 2524: 2522: 2521: 2516: 2489: 2488: 2483: 2474: 2473: 2468: 2459: 2458: 2414: 2407: 2403: 2400: 2394: 2371: 2363: 2319: 2317: 2316: 2311: 2294: 2293: 2269: 2268: 2238: 2237: 2204: 2202: 2201: 2196: 2188: 2187: 2172: 2171: 2161: 2131: 2130: 2111: 2109: 2108: 2103: 2101: 2100: 2090: 2053:Frostman's lemma 1953:Edward Szpilrajn 1902: 1900: 1899: 1894: 1877: 1876: 1852: 1851: 1841: 1819: 1817: 1816: 1811: 1794: 1793: 1769: 1768: 1767: 1705:be an arbitrary 1689: 1682: 1678: 1675: 1669: 1646: 1638: 1549: 1547: 1546: 1541: 1539: 1538: 1522: 1520: 1519: 1514: 1502: 1500: 1499: 1494: 1492: 1491: 1486: 1438: 1436: 1435: 1430: 1408: 1406: 1405: 1400: 1388: 1383: 1368:In other words, 1364: 1362: 1361: 1356: 1354: 1350: 1343: 1342: 1332: 1327: 1309: 1308: 1299: 1298: 1279: 1274: 1238: 1233: 1211: 1206: 1187: 1185: 1184: 1179: 1163: 1161: 1160: 1155: 1135: 1133: 1132: 1127: 1115: 1113: 1112: 1107: 1095: 1093: 1092: 1087: 1075: 1073: 1072: 1067: 1030: 1028: 1027: 1022: 999: 998: 993: 992: 964: 950: 949: 930: 928: 927: 922: 910: 908: 907: 902: 900: 886: 885: 858: 856: 855: 850: 834: 832: 831: 826: 814: 809: 799: 772: 771: 766: 765: 751: 749: 748: 743: 731: 729: 728: 723: 704: 702: 701: 696: 691: 687: 680: 679: 655: 654: 644: 639: 621: 620: 611: 610: 591: 586: 550: 545: 526: 524: 523: 518: 488: 486: 485: 480: 458: 456: 455: 450: 433:Lebesgue measure 307: = 1. 244: 237: 233: 230: 224: 201: 193: 140: 138: 137: 132: 130: 125: 120: 43:is a measure of 4218: 4217: 4213: 4212: 4211: 4209: 4208: 4207: 4198:Metric geometry 4183: 4182: 4181: 4176: 4165: 4144: 4080: 4018: 3972: 3963: 3929:Euclidean space 3912: 3907: 3860: 3855: 3776: 3761: 3746: 3680: 3662:Mattila, Pertti 3561: 3518: 3516:Further reading 3513: 3512: 3483: 3479: 3472: 3458: 3454: 3443: 3439: 3400: 3396: 3391: 3387: 3376:Brownian Motion 3372: 3368: 3353: 3349: 3300: 3293: 3276: 3272: 3262: 3260: 3256: 3250: 3246: 3239: 3218: 3209: 3197: 3190: 3182: 3178: 3137: 3133: 3121: 3112: 3107: 3073: 2999: 2995: 2977: 2973: 2972: 2968: 2962: 2958: 2956: 2953: 2952: 2920: 2916: 2910: 2899: 2872: 2869: 2868: 2832: 2827: 2817: 2806: 2800: 2797: 2796: 2775: 2759: 2710: 2706: 2700: 2689: 2683: 2680: 2679: 2667: 2652: 2646: 2592: 2588: 2582: 2571: 2559: 2556: 2555: 2541: 2484: 2479: 2478: 2469: 2464: 2463: 2454: 2450: 2448: 2445: 2444: 2415: 2404: 2398: 2395: 2384: 2372: 2361: 2289: 2285: 2264: 2260: 2233: 2229: 2227: 2224: 2223: 2183: 2179: 2167: 2163: 2151: 2126: 2122: 2120: 2117: 2116: 2096: 2092: 2080: 2068: 2065: 2064: 2061: 2042: 1977: 1961: 1947: 1934: 1872: 1868: 1847: 1843: 1837: 1831: 1828: 1827: 1789: 1785: 1754: 1753: 1749: 1747: 1744: 1743: 1724: 1699: 1690: 1679: 1673: 1670: 1659: 1647: 1636: 1600:Brownian motion 1534: 1530: 1528: 1525: 1524: 1508: 1505: 1504: 1487: 1482: 1481: 1479: 1476: 1475: 1473:Euclidean space 1446: 1415: 1412: 1411: 1384: 1379: 1373: 1370: 1369: 1338: 1334: 1328: 1317: 1304: 1300: 1294: 1290: 1275: 1264: 1259: 1255: 1234: 1229: 1207: 1202: 1196: 1193: 1192: 1173: 1170: 1169: 1149: 1146: 1145: 1142: 1121: 1118: 1117: 1101: 1098: 1097: 1081: 1078: 1077: 1043: 1040: 1039: 994: 988: 987: 986: 954: 945: 941: 939: 936: 935: 916: 913: 912: 890: 881: 877: 875: 872: 871: 865: 844: 841: 840: 837:measurable sets 810: 805: 789: 767: 761: 760: 759: 757: 754: 753: 737: 734: 733: 717: 714: 713: 675: 671: 650: 646: 640: 629: 616: 612: 606: 602: 587: 576: 571: 567: 546: 541: 535: 532: 531: 494: 491: 490: 468: 465: 464: 444: 441: 440: 425: 419: 346:is very small, 245: 234: 228: 225: 214: 202: 191: 121: 119: 117: 114: 113: 88:self-similarity 70:is 2, and of a 56:Felix Hausdorff 17: 12: 11: 5: 4216: 4206: 4205: 4200: 4195: 4178: 4177: 4170: 4167: 4166: 4164: 4163: 4158: 4152: 4150: 4146: 4145: 4143: 4142: 4134: 4129: 4124: 4119: 4114: 4109: 4104: 4099: 4094: 4088: 4086: 4082: 4081: 4079: 4078: 4073: 4068: 4066:Cross-polytope 4063: 4058: 4053: 4051:Hyperrectangle 4048: 4043: 4038: 4032: 4030: 4020: 4019: 4017: 4016: 4011: 4006: 4001: 3996: 3991: 3986: 3980: 3978: 3974: 3973: 3966: 3964: 3962: 3961: 3956: 3951: 3946: 3941: 3936: 3931: 3926: 3920: 3918: 3914: 3913: 3906: 3905: 3898: 3891: 3883: 3877: 3876: 3870: 3859: 3858:External links 3856: 3854: 3853: 3840: 3828:(5): 713–747. 3813: 3772:(March 1919). 3766: 3759: 3718: 3700:(1): 161–193. 3684: 3678: 3658: 3632:(3): 198–202. 3621: 3591: 3581:Wallman, Henry 3573: 3559: 3519: 3517: 3514: 3511: 3510: 3497:(5): 713–747. 3477: 3470: 3452: 3437: 3410:(3): 198–202. 3394: 3385: 3366: 3347: 3310:(6): 509–528. 3291: 3270: 3244: 3237: 3207: 3188: 3176: 3147:(2): 247–277. 3131: 3109: 3108: 3106: 3103: 3102: 3101: 3096: 3091: 3086: 3080: 3072: 3069: 3039: 3038: 3027: 3024: 3021: 3017: 3013: 3010: 3007: 3002: 2998: 2994: 2991: 2988: 2985: 2980: 2976: 2971: 2965: 2961: 2946: 2945: 2934: 2931: 2928: 2923: 2919: 2913: 2908: 2905: 2902: 2898: 2894: 2891: 2888: 2885: 2882: 2879: 2876: 2855: 2854: 2843: 2840: 2835: 2830: 2826: 2820: 2815: 2812: 2809: 2805: 2771: 2755: 2745: 2744: 2733: 2730: 2727: 2724: 2721: 2718: 2713: 2709: 2703: 2698: 2695: 2692: 2688: 2663: 2648:Main article: 2645: 2642: 2621: 2620: 2609: 2606: 2603: 2600: 2595: 2591: 2585: 2580: 2577: 2574: 2570: 2566: 2563: 2539: 2526: 2525: 2514: 2511: 2508: 2505: 2502: 2499: 2496: 2492: 2487: 2482: 2477: 2472: 2467: 2462: 2457: 2453: 2417: 2416: 2375: 2373: 2366: 2360: 2357: 2321: 2320: 2309: 2306: 2303: 2300: 2297: 2292: 2288: 2284: 2281: 2278: 2275: 2272: 2267: 2263: 2259: 2256: 2253: 2250: 2247: 2244: 2241: 2236: 2232: 2206: 2205: 2194: 2191: 2186: 2182: 2178: 2175: 2170: 2166: 2160: 2157: 2154: 2150: 2146: 2143: 2140: 2137: 2134: 2129: 2125: 2099: 2095: 2089: 2086: 2083: 2079: 2075: 2072: 2060: 2057: 2040: 1979:If there is a 1976: 1973: 1960: 1957: 1943: 1930: 1904: 1903: 1892: 1889: 1886: 1883: 1880: 1875: 1871: 1867: 1864: 1861: 1858: 1855: 1850: 1846: 1840: 1836: 1821: 1820: 1809: 1806: 1803: 1800: 1797: 1792: 1788: 1784: 1781: 1778: 1775: 1772: 1766: 1763: 1760: 1757: 1752: 1722: 1698: 1695: 1692: 1691: 1650: 1648: 1641: 1635: 1632: 1631: 1630: 1604: 1603: 1596: 1586: 1575:Master theorem 1551: 1537: 1533: 1512: 1490: 1485: 1469: 1466:Countable sets 1445: 1442: 1428: 1425: 1422: 1419: 1398: 1395: 1392: 1387: 1382: 1378: 1366: 1365: 1353: 1349: 1346: 1341: 1337: 1331: 1326: 1323: 1320: 1316: 1312: 1307: 1303: 1297: 1293: 1289: 1286: 1283: 1278: 1273: 1270: 1267: 1263: 1258: 1254: 1251: 1248: 1245: 1242: 1237: 1232: 1228: 1224: 1221: 1218: 1215: 1210: 1205: 1201: 1188:is defined by 1177: 1153: 1141: 1138: 1125: 1105: 1085: 1076:such that the 1065: 1062: 1059: 1056: 1053: 1050: 1047: 1038:of the set of 1032: 1031: 1020: 1017: 1014: 1011: 1008: 1005: 1002: 997: 991: 985: 982: 979: 976: 973: 970: 967: 963: 960: 957: 953: 948: 944: 931:is defined by 920: 899: 896: 893: 889: 884: 880: 864: 861: 848: 824: 821: 818: 813: 808: 804: 798: 795: 792: 788: 784: 781: 778: 775: 770: 764: 741: 721: 706: 705: 694: 690: 686: 683: 678: 674: 670: 667: 664: 661: 658: 653: 649: 643: 638: 635: 632: 628: 624: 619: 615: 609: 605: 601: 598: 595: 590: 585: 582: 579: 575: 570: 566: 563: 560: 557: 554: 549: 544: 540: 516: 513: 510: 507: 504: 501: 498: 478: 475: 472: 448: 421:Main article: 418: 415: 409:coincide. The 393:observed that 247: 246: 205: 203: 196: 190: 187: 166:Koch snowflake 162:irregular sets 128: 124: 62:is zero, of a 15: 9: 6: 4: 3: 2: 4215: 4204: 4201: 4199: 4196: 4194: 4191: 4190: 4188: 4175: 4174: 4168: 4162: 4159: 4157: 4154: 4153: 4151: 4147: 4141: 4139: 4135: 4133: 4130: 4128: 4125: 4123: 4120: 4118: 4115: 4113: 4110: 4108: 4105: 4103: 4100: 4098: 4095: 4093: 4090: 4089: 4087: 4083: 4077: 4074: 4072: 4069: 4067: 4064: 4062: 4059: 4057: 4056:Demihypercube 4054: 4052: 4049: 4047: 4044: 4042: 4039: 4037: 4034: 4033: 4031: 4029: 4025: 4021: 4015: 4012: 4010: 4007: 4005: 4002: 4000: 3997: 3995: 3992: 3990: 3987: 3985: 3982: 3981: 3979: 3975: 3970: 3960: 3957: 3955: 3952: 3950: 3947: 3945: 3942: 3940: 3937: 3935: 3932: 3930: 3927: 3925: 3922: 3921: 3919: 3915: 3911: 3904: 3899: 3897: 3892: 3890: 3885: 3884: 3881: 3874: 3871: 3869: 3865: 3862: 3861: 3850: 3846: 3841: 3836: 3831: 3827: 3823: 3819: 3814: 3810: 3806: 3802: 3798: 3794: 3790: 3786: 3782: 3775: 3771: 3767: 3762: 3760:0-201-58701-7 3756: 3752: 3743: 3739: 3735: 3731: 3727: 3723: 3719: 3715: 3711: 3707: 3703: 3699: 3695: 3694: 3689: 3685: 3681: 3675: 3671: 3667: 3663: 3659: 3655: 3651: 3647: 3643: 3639: 3635: 3631: 3627: 3622: 3617: 3612: 3608: 3604: 3600: 3596: 3592: 3588: 3587: 3582: 3578: 3574: 3570: 3566: 3562: 3560:9780821836378 3556: 3552: 3548: 3544: 3540: 3535: 3530: 3526: 3521: 3520: 3505: 3500: 3496: 3492: 3488: 3481: 3473: 3471:0-521-25694-1 3467: 3463: 3456: 3448: 3441: 3433: 3429: 3425: 3421: 3417: 3413: 3409: 3405: 3398: 3389: 3381: 3377: 3370: 3362: 3358: 3351: 3343: 3339: 3335: 3331: 3327: 3323: 3318: 3313: 3309: 3305: 3298: 3296: 3286: 3281: 3274: 3255: 3248: 3240: 3238:0-7167-1186-9 3234: 3229: 3228: 3222: 3216: 3214: 3212: 3204: 3201: 3195: 3193: 3185: 3180: 3172: 3168: 3164: 3160: 3155: 3150: 3146: 3142: 3135: 3128: 3125: 3119: 3117: 3115: 3110: 3100: 3097: 3095: 3092: 3090: 3087: 3084: 3081: 3078: 3075: 3074: 3068: 3066: 3062: 3060: 3056: 3052: 3048: 3044: 3025: 3022: 3019: 3015: 3008: 3000: 2996: 2992: 2986: 2978: 2974: 2969: 2963: 2959: 2951: 2950: 2949: 2929: 2921: 2917: 2911: 2906: 2903: 2900: 2896: 2892: 2886: 2880: 2874: 2867: 2866: 2865: 2863: 2858: 2841: 2838: 2833: 2828: 2824: 2818: 2813: 2810: 2807: 2803: 2795: 2794: 2793: 2791: 2787: 2783: 2779: 2774: 2769: 2765: 2763: 2758: 2752: 2750: 2731: 2728: 2725: 2719: 2711: 2707: 2701: 2696: 2693: 2690: 2686: 2678: 2677: 2676: 2674: 2669: 2666: 2661: 2657: 2651: 2641: 2639: 2635: 2631: 2627: 2626:Stefan Banach 2607: 2601: 2593: 2589: 2583: 2578: 2575: 2572: 2568: 2564: 2561: 2554: 2553: 2552: 2550: 2546: 2542: 2535: 2531: 2512: 2509: 2506: 2503: 2500: 2497: 2494: 2490: 2485: 2470: 2460: 2455: 2451: 2443: 2442: 2441: 2439: 2434: 2432: 2428: 2424: 2413: 2410: 2402: 2392: 2388: 2382: 2381: 2376:This section 2374: 2370: 2365: 2364: 2356: 2354: 2350: 2346: 2342: 2338: 2334: 2330: 2326: 2307: 2301: 2295: 2290: 2286: 2282: 2276: 2270: 2265: 2261: 2257: 2251: 2248: 2245: 2239: 2234: 2230: 2222: 2221: 2220: 2218: 2214: 2209: 2192: 2184: 2180: 2173: 2168: 2164: 2158: 2155: 2152: 2144: 2138: 2132: 2127: 2123: 2115: 2114: 2113: 2097: 2093: 2087: 2084: 2081: 2077: 2073: 2070: 2056: 2054: 2050: 2046: 2038: 2034: 2030: 2026: 2022: 2018: 2014: 2010: 2006: 2002: 1999:) > 0 and 1998: 1994: 1990: 1986: 1983:μ defined on 1982: 1972: 1970: 1966: 1956: 1954: 1949: 1946: 1942: 1938: 1933: 1929: 1925: 1921: 1917: 1913: 1909: 1890: 1884: 1878: 1873: 1869: 1865: 1859: 1853: 1848: 1844: 1838: 1826: 1825: 1824: 1807: 1801: 1795: 1790: 1786: 1782: 1776: 1770: 1750: 1742: 1741: 1740: 1738: 1734: 1730: 1728: 1720: 1716: 1712: 1708: 1704: 1688: 1685: 1677: 1667: 1663: 1657: 1656: 1651:This section 1649: 1645: 1640: 1639: 1628: 1627:Great Britain 1624: 1620: 1617: 1616: 1613: 1608: 1601: 1597: 1594: 1590: 1587: 1584: 1580: 1576: 1571: 1567: 1563: 1559: 1555: 1552: 1535: 1531: 1510: 1488: 1474: 1470: 1467: 1464: 1463: 1459: 1456:example. The 1455: 1450: 1441: 1439: 1423: 1393: 1385: 1380: 1376: 1351: 1347: 1344: 1339: 1335: 1324: 1321: 1318: 1314: 1310: 1305: 1295: 1291: 1287: 1284: 1271: 1268: 1265: 1261: 1256: 1249: 1243: 1235: 1226: 1222: 1216: 1208: 1203: 1199: 1191: 1190: 1189: 1175: 1167: 1164:-dimensional 1151: 1137: 1123: 1103: 1083: 1057: 1054: 1048: 1045: 1037: 1018: 1012: 1009: 1003: 995: 983: 980: 977: 974: 965: 958: 951: 942: 934: 933: 932: 918: 894: 887: 878: 870: 860: 846: 838: 819: 811: 806: 802: 796: 790: 782: 776: 768: 739: 719: 711: 692: 688: 684: 681: 676: 672: 668: 665: 662: 659: 656: 651: 647: 636: 633: 630: 626: 622: 617: 607: 603: 599: 596: 583: 580: 577: 573: 568: 561: 555: 547: 542: 538: 530: 529: 528: 508: 505: 499: 496: 476: 473: 470: 462: 446: 438: 437:outer measure 434: 430: 424: 414: 412: 408: 402: 398: 396: 392: 387: 385: 381: 377: 373: 370:) grows as 1/ 369: 365: 361: 357: 353: 349: 345: 341: 337: 333: 329: 325: 321: 316: 314: 308: 306: 302: 298: 294: 290: 284: 282: 278: 274: 270: 266: 262: 258: 254: 243: 240: 232: 222: 218: 212: 211: 206:This section 204: 200: 195: 194: 186: 184: 179: 177: 172: 167: 163: 159: 155: 152:-dimensional 151: 147: 142: 111: 107: 102: 101: 97: 93: 89: 85: 81: 77: 73: 69: 65: 61: 57: 54: 53:mathematician 50: 46: 42: 38: 30: 26: 21: 4171: 4137: 4076:Hyperpyramid 4041:Hypersurface 3998: 3934:Affine space 3924:Vector space 3844: 3825: 3821: 3784: 3780: 3770:F. Hausdorff 3750: 3736:(1): 18–25. 3733: 3729: 3726:H. D. Ursell 3697: 3691: 3665: 3629: 3625: 3606: 3602: 3595:E. Szpilrajn 3585: 3534:math/0305399 3524: 3494: 3490: 3480: 3461: 3455: 3446: 3440: 3407: 3403: 3397: 3388: 3375: 3369: 3356: 3350: 3317:math/0505099 3307: 3303: 3273: 3261:. Retrieved 3247: 3226: 3199: 3179: 3144: 3140: 3134: 3123: 3064: 3063: 3050: 3046: 3042: 3040: 2947: 2861: 2859: 2856: 2789: 2785: 2772: 2767: 2766: 2761: 2756: 2753: 2746: 2672: 2670: 2664: 2659: 2655: 2653: 2633: 2623: 2548: 2547:compact set 2544: 2537: 2533: 2527: 2437: 2436: 2430: 2426: 2422: 2420: 2405: 2396: 2385:Please help 2380:verification 2377: 2352: 2344: 2340: 2336: 2332: 2328: 2324: 2322: 2216: 2212: 2210: 2207: 2062: 2048: 2044: 2036: 2032: 2028: 2024: 2020: 2016: 2012: 2008: 2004: 2000: 1996: 1992: 1988: 1978: 1962: 1950: 1944: 1940: 1936: 1931: 1927: 1923: 1919: 1915: 1912:homeomorphic 1907: 1905: 1822: 1736: 1732: 1731: 1726: 1718: 1702: 1700: 1680: 1671: 1660:Please help 1655:verification 1652: 1623:South Africa 1577:for solving 1367: 1165: 1143: 1033: 868: 866: 707: 461:metric space 435:. First, an 426: 404: 400: 388: 383: 375: 371: 367: 366:such that N( 363: 359: 355: 351: 347: 343: 339: 335: 327: 323: 317: 309: 304: 300: 296: 292: 285: 281:continuously 280: 277:surjectively 252: 250: 235: 226: 215:Please help 210:verification 207: 180: 157: 149: 146:vector space 143: 106:metric space 103: 99: 64:line segment 44: 40: 34: 4161:Codimension 4140:-dimensions 4061:Hypersphere 3944:Free module 2532:mapping on 2530:contraction 2528:are each a 1711:topological 1593:Peano curve 257:cardinality 171:equilateral 66:is 1, of a 37:mathematics 4187:Categories 4156:Hyperspace 4036:Hyperplane 3263:3 February 3105:References 2551:such that 2440:. Suppose 2399:March 2015 2039:, then dim 1991:such that 1823:Moreover, 1735:. 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Index


iterations
Koch curve
mathematics
fractal dimension
mathematician
Felix Hausdorff
point
line segment
square
cube
integer
topological dimension
scaling
self-similarity
fractals
Abram Samoilovitch Besicovitch
metric space
extended real numbers
vector space
inner product space
irregular sets
Koch snowflake
equilateral
natural logarithms
Minkowski–Bouligand dimension

verification
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