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Normal operator

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2542: 1821: 2537:{\displaystyle {\begin{aligned}\operatorname {tr} (XX^{*})&=\operatorname {tr} \left(P_{V}TT^{*}P_{V}-P_{V}TP_{V}T^{*}P_{V}\right)\\&=\operatorname {tr} (P_{V}TT^{*}P_{V})-\operatorname {tr} (P_{V}TP_{V}T^{*}P_{V})\\&=\operatorname {tr} (P_{V}^{2}TT^{*})-\operatorname {tr} (P_{V}^{2}TP_{V}T^{*})\\&=\operatorname {tr} (P_{V}TT^{*})-\operatorname {tr} (P_{V}TP_{V}T^{*})\\&=\operatorname {tr} (P_{V}TT^{*})-\operatorname {tr} (TP_{V}T^{*})&&{\text{using the hypothesis that }}T{\text{ stabilizes }}V\\&=\operatorname {tr} (P_{V}TT^{*})-\operatorname {tr} (P_{V}T^{*}T)\\&=\operatorname {tr} (P_{V}(TT^{*}-T^{*}T))\\&=0.\end{aligned}}} 4490: 25: 1806: 1112:
Eigenvectors of a normal operator corresponding to different eigenvalues are orthogonal, and a normal operator stabilizes the orthogonal complement of each of its eigenspaces. This implies the usual spectral theorem: every normal operator on a finite-dimensional space is diagonalizable by a unitary
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The success of the theory of normal operators led to several attempts for generalization by weakening the commutativity requirement. Classes of operators that include normal operators are (in order of inclusion)
1801:{\displaystyle {\begin{aligned}XX^{*}&=P_{V}T({\boldsymbol {1}}_{H}-P_{V})^{2}T^{*}P_{V}\\&=P_{V}T({\boldsymbol {1}}_{H}-P_{V})T^{*}P_{V}\\&=P_{V}TT^{*}P_{V}-P_{V}TP_{V}T^{*}P_{V}.\end{aligned}}} 2833: 1826: 1534: 770: 708: 2765: 1080: 833: 1305: 414: 2688: 1249: 653: 361: 2584: 1033: 285: 1110: 1180: 1153: 970: 903: 439: 3641: 1013: 1200: 1053: 990: 943: 923: 876: 856: 604: 584: 434: 332: 309: 3108: 3097: 945:
is injective. Put in another way, the kernel of a normal operator is the orthogonal complement of its range. It follows that the kernel of the operator
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The spectral theorem still holds for unbounded (normal) operators. The proofs work by reduction to bounded (normal) operators.
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The same argument goes through for compact normal operators in infinite dimensional Hilbert spaces, where one make use of the
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The definition of normal operators naturally generalizes to some class of unbounded operators. Explicitly, a closed operator
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The product of normal operators that commute is again normal; this is nontrivial, but follows directly from
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operator. There is also an infinite-dimensional version of the spectral theorem expressed in terms of
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holds for them. The class of normal operators is well understood. Examples of normal operators are
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AndĂŽ, Tsuyoshi (1963). "Note on invariant subspaces of a compact normal operator".
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The invariant subspaces of a shift acting on Hardy space are characterized by
4508: 4465: 4389: 4118: 4103: 4093: 3843: 3815: 1512: 254: 137: 4455: 4108: 4078: 3506: 3360: 3301: 3105: 3094: 2945:(2nd ed.), Englewood Cliffs, N.J.: Prentice-Hall, Inc., p. 312, 4384: 4374: 4281: 4083: 3965: 3703: 3288: 122: 3126:, A Course in Functional Analysis, Second Edition, Chapter X, Section §4 4317: 4149: 3196: 3031: 2623: 162: 3181: 3167: 2938: 2701:
be dense, and the equality includes the assertion that the domain of
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The notion of normal operators generalizes to an involutive algebra:
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have the same kernel and the same range. Consequently, the range of
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Weidmann, Lineare Operatoren in HilbertrÀumen, Chapter 4, Section 3
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Every generalized eigenvalue of a normal operator is thus genuine.
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is the matrix expression of a normal operator on the Hilbert space
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Alexander Frei, Spectral Measures, Mathematics Stack Exchange,
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Equivalently normal operators are precisely those for which
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The most important case is when such an algebra is a
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be a bounded operator. The following are equivalent.
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real or complex Hilbert space (inner product space)
49:. Unsourced material may be challenged and removed. 4380:Spectral theory of ordinary differential equations 3744:Spectral theory of ordinary differential equations 3162: 2981:Linear Operator Theory in Engineering and Sciences 2827: 2759: 2682: 2578: 2536: 1800: 1311:The operator norm of a normal operator equals its 1299: 1243: 1194: 1174: 1147: 1124:, which states (in a form generalized by Putnam): 1104: 1074: 1047: 1027: 1007: 984: 964: 937: 917: 897: 870: 850: 827: 764: 702: 647: 598: 578: 555: 428: 408: 355: 326: 303: 3642:Schröder–Bernstein theorems for operator algebras 2608:of an involutive algebra is said to be normal if 4506: 2709:, which is not necessarily the case in general. 566:The self-adjoint and anti–self adjoint parts of 1354:. (This statement is trivial in the case where 765:{\displaystyle i\,T_{2}:={\frac {T-T^{*}}{2}},} 3015: 2619:Self-adjoint and unitary elements are normal. 2596: 4036: 3800: 3148: 3052: 2629: 2962: 2936: 2891: â€“ Bounded operators with sub-unit norm 2753: 2737: 2731: 2722: 544: 527: 521: 496: 490: 465: 453: 443: 403: 387: 381: 372: 2586:, which is normal, but has no eigenvalues. 703:{\displaystyle T_{1}:={\frac {T+T^{*}}{2}}} 183:Normal operators are important because the 4043: 4029: 3807: 3793: 3155: 3141: 269:Normal operators are characterized by the 720: 109:Learn how and when to remove this message 4333:Group algebra of a locally compact group 2978:Naylor, Arch W.; Sell George R. (1982). 2973: 2971: 2908:In contrast, for the important class of 2760:{\displaystyle \|Nx\|=\|N^{*}x\|\qquad } 1815:and of orthogonal projections we have: 1202:is a bounded linear operator such that 277:(in particular, a normal operator on a 4507: 3046: 1375:. Then the orthogonal projection onto 1075:{\displaystyle {\overline {\lambda }}} 1035:is an eigenvalue of a normal operator 828:{\displaystyle T_{1}T_{2}=T_{2}T_{1}.} 4024: 3788: 3475:Spectral theory of normal C*-algebras 3273:Spectral theory of normal C*-algebras 3136: 3117: 2968: 1330:Properties in finite-dimensional case 1322:A normal operator coincides with its 1300:{\displaystyle N_{1}^{*}A=AN_{2}^{*}} 1055:if and only if its complex conjugate 3470:Spectral theory of compact operators 47:adding citations to reliable sources 18: 3087: 2910:Creation and annihilation operators 2693:Here, the existence of the adjoint 13: 3814: 3622:Cohen–Hewitt factorization theorem 2801: 2782: 1371:be the orthogonal projection onto 14: 4531: 3931:Compact operator on Hilbert space 3627:Extensions of symmetric operators 2841: 1515:on the space of endomorphisms of 409:{\displaystyle \|Tx\|=\|T^{*}x\|} 4489: 4488: 4415:Topological quantum field theory 3445:Positive operator-valued measure 1656: 1575: 207:(i.e., self-adjoint operators): 23: 3729:Rayleigh–Faber–Krahn inequality 3067:from the original on 2011-09-18 2998:from the original on 2021-06-26 2756: 2559:(or two-sided shift) acting on 2353:using the hypothesis that  1519:, it is enough to show that tr( 34:needs additional citations for 3078: 3009: 2930: 2902: 2819: 2806: 2793: 2787: 2683:{\displaystyle N^{*}N=NN^{*}.} 2514: 2511: 2479: 2466: 2447: 2421: 2409: 2383: 2345: 2319: 2307: 2281: 2262: 2226: 2214: 2188: 2169: 2128: 2116: 2085: 2066: 2020: 2008: 1972: 1851: 1835: 1679: 1651: 1599: 1570: 1244:{\displaystyle N_{1}A=AN_{2},} 648:{\displaystyle T=T_{1}+iT_{2}} 1: 4211:Uniform boundedness principle 3637:Limiting absorption principle 3055:"Operators on Hilbert spaces" 2923: 2889:Contraction (operator theory) 2549:Hilbert-Schmidt inner product 264: 3263:Singular value decomposition 2697:requires that the domain of 1811:Now using properties of the 1182:are normal operators and if 1067: 7: 3694:Hearing the shape of a drum 3377:Decomposition of a spectrum 2877: 2597:Normal elements of algebras 1444:. The goal is to show that 858:is a normal operator, then 10: 4536: 4354:Invariant subspace problem 3900:Hilbert projection theorem 3282:Special Elements/Operators 2963:Hoffman & Kunze (1971) 2884:Continuous linear operator 2630:Unbounded normal operators 1523:) = 0. First we note that 1115:projection-valued measures 356:{\displaystyle T^{\star }} 4484: 4443: 4367: 4346: 4305: 4244: 4186: 4132: 4074: 4067: 3979: 3923: 3892: 3879:Cauchy–Schwarz inequality 3866: 3822: 3754:Superstrong approximation 3676: 3660: 3617:Banach algebra cohomology 3604: 3568: 3537: 3483: 3450:Projection-valued measure 3435:Borel functional calculus 3427: 3369: 3326: 3281: 3235: 3207:Projection-valued measure 3174: 2638:is said to be normal if 2579:{\displaystyle \ell ^{2}} 4323:Spectrum of a C*-algebra 3346:Spectrum of a C*-algebra 3217:Spectrum of a C*-algebra 2895: 1028:{\displaystyle \lambda } 925:is dense if and only if 286:unitarily diagonalizable 4420:Noncommutative geometry 3774:Wiener–Khinchin theorem 3709:Kuznetsov trace formula 3684:Almost Mathieu operator 3502:Banach function algebra 3491:Amenable Banach algebra 3248:Gelfand–Naimark theorem 3202:Noncommutative topology 972:coincides with that of 275:compact normal operator 4476:Tomita–Takesaki theory 4451:Approximation property 4395:Calculus of variations 3749:Sturm–Liouville theory 3647:Sherman–Takeda theorem 3527:Tomita–Takesaki theory 3302:Hermitian/Self-adjoint 3253:Gelfand representation 3053:Garrett, Paul (2005). 2984:. New York: Springer. 2829: 2761: 2684: 2580: 2538: 2361: stabilizes  1802: 1346:stabilizes a subspace 1301: 1245: 1196: 1176: 1149: 1106: 1105:{\displaystyle N^{*}.} 1076: 1049: 1029: 1009: 986: 966: 939: 919: 899: 872: 852: 829: 766: 704: 649: 600: 580: 557: 430: 410: 357: 328: 305: 4471:Banach–Mazur distance 4434:Generalized functions 3910:Polarization identity 3853:Orthogonal complement 3243:Gelfand–Mazur theorem 3019:Archiv der Mathematik 2867:Quasinormal operators 2830: 2762: 2685: 2581: 2539: 1803: 1403:can be expressed as ( 1334:If a normal operator 1302: 1246: 1197: 1177: 1175:{\displaystyle N_{2}} 1150: 1148:{\displaystyle N_{1}} 1107: 1077: 1050: 1030: 1010: 987: 967: 965:{\displaystyle N^{k}} 940: 920: 900: 898:{\displaystyle N^{*}} 873: 853: 830: 767: 705: 650: 601: 586:commute. That is, if 581: 558: 431: 411: 358: 329: 306: 4216:Kakutani fixed-point 4201:Riesz representation 3884:Riesz representation 3839:L-semi-inner product 3719:Proto-value function 3698:Dirichlet eigenvalue 3612:Abstract index group 3497:Approximate identity 3460:Rigged Hilbert space 3336:Krein–Rutman theorem 3182:Involution/*-algebra 2916:, they don't commute 2914:quantum field theory 2862:Paranormal operators 2852:Hyponormal operators 2777: 2719: 2645: 2563: 1822: 1530: 1255: 1206: 1186: 1159: 1132: 1086: 1082:is an eigenvalue of 1059: 1039: 1019: 996: 976: 949: 929: 909: 882: 862: 842: 776: 714: 659: 610: 590: 570: 440: 420: 369: 340: 318: 295: 43:improve this article 4400:Functional calculus 4359:Mahler's conjecture 4338:Von Neumann algebra 4052:Functional analysis 3905:Parseval's identity 3874:Bessel's inequality 3522:Von Neumann algebra 3258:Polar decomposition 2872:Subnormal operators 2145: 2102: 1296: 1272: 282:inner product space 205:Hermitian operators 127:functional analysis 4425:Riemann hypothesis 4124:Topological vector 3652:Unbounded operator 3581:Essential spectrum 3560:Schur–Horn theorem 3550:Bauer–Fike theorem 3545:Alon–Boppana bound 3538:Finite-Dimensional 3512:Nuclear C*-algebra 3356:Spectral asymmetry 3111:2021-06-26 at the 3100:2021-06-26 at the 3032:10.1007/BF01234964 2937:Hoffman, Kenneth; 2825: 2757: 2680: 2591:Beurling's theorem 2576: 2534: 2532: 2131: 2088: 1798: 1796: 1358:is self-adjoint.) 1340:finite-dimensional 1297: 1282: 1258: 1241: 1192: 1172: 1145: 1102: 1072: 1045: 1025: 1008:{\displaystyle k.} 1005: 982: 962: 935: 915: 895: 868: 848: 825: 762: 700: 645: 596: 576: 553: 426: 406: 353: 324: 301: 279:finite-dimensional 231:positive operators 4502: 4501: 4405:Integral operator 4182: 4181: 4018: 4017: 3961:Sesquilinear form 3914:Parallelogram law 3858:Orthonormal basis 3782: 3781: 3759:Transfer operator 3734:Spectral geometry 3419:Spectral abscissa 3399:Approximate point 3341:Normal eigenvalue 2991:978-0-387-95001-3 2362: 2354: 1324:Aluthge transform 1195:{\displaystyle A} 1122:Fuglede's theorem 1070: 1048:{\displaystyle N} 985:{\displaystyle N} 938:{\displaystyle N} 918:{\displaystyle N} 871:{\displaystyle N} 851:{\displaystyle N} 757: 698: 599:{\displaystyle T} 579:{\displaystyle T} 429:{\displaystyle x} 327:{\displaystyle T} 304:{\displaystyle T} 249:is self-adjoint). 192:unitary operators 167:Hermitian adjoint 119: 118: 111: 93: 58:"Normal operator" 4527: 4515:Linear operators 4492: 4491: 4410:Jones polynomial 4328:Operator algebra 4072: 4071: 4045: 4038: 4031: 4022: 4021: 3848:Prehilbert space 3809: 3802: 3795: 3786: 3785: 3764:Transform theory 3484:Special algebras 3465:Spectral theorem 3428:Spectral Theorem 3268:Spectral theorem 3157: 3150: 3143: 3134: 3133: 3127: 3121: 3115: 3091: 3085: 3082: 3076: 3075: 3073: 3072: 3066: 3059: 3050: 3044: 3043: 3013: 3007: 3006: 3004: 3003: 2975: 2966: 2960: 2954: 2953: 2934: 2917: 2906: 2834: 2832: 2831: 2826: 2818: 2817: 2805: 2804: 2786: 2785: 2766: 2764: 2763: 2758: 2749: 2748: 2689: 2687: 2686: 2681: 2676: 2675: 2657: 2656: 2585: 2583: 2582: 2577: 2575: 2574: 2551:, defined by tr( 2543: 2541: 2540: 2535: 2533: 2520: 2507: 2506: 2494: 2493: 2478: 2477: 2453: 2443: 2442: 2433: 2432: 2408: 2407: 2395: 2394: 2370: 2363: 2360: 2355: 2352: 2349: 2344: 2343: 2334: 2333: 2306: 2305: 2293: 2292: 2268: 2261: 2260: 2251: 2250: 2238: 2237: 2213: 2212: 2200: 2199: 2175: 2168: 2167: 2158: 2157: 2144: 2139: 2115: 2114: 2101: 2096: 2072: 2065: 2064: 2055: 2054: 2045: 2044: 2032: 2031: 2007: 2006: 1997: 1996: 1984: 1983: 1959: 1955: 1951: 1950: 1949: 1940: 1939: 1930: 1929: 1917: 1916: 1904: 1903: 1894: 1893: 1881: 1880: 1850: 1849: 1807: 1805: 1804: 1799: 1797: 1790: 1789: 1780: 1779: 1770: 1769: 1757: 1756: 1744: 1743: 1734: 1733: 1721: 1720: 1705: 1701: 1700: 1691: 1690: 1678: 1677: 1665: 1664: 1659: 1647: 1646: 1631: 1627: 1626: 1617: 1616: 1607: 1606: 1597: 1596: 1584: 1583: 1578: 1566: 1565: 1549: 1548: 1395:. The fact that 1313:numerical radius 1306: 1304: 1303: 1298: 1295: 1290: 1271: 1266: 1250: 1248: 1247: 1242: 1237: 1236: 1218: 1217: 1201: 1199: 1198: 1193: 1181: 1179: 1178: 1173: 1171: 1170: 1154: 1152: 1151: 1146: 1144: 1143: 1111: 1109: 1108: 1103: 1098: 1097: 1081: 1079: 1078: 1073: 1071: 1063: 1054: 1052: 1051: 1046: 1034: 1032: 1031: 1026: 1014: 1012: 1011: 1006: 991: 989: 988: 983: 971: 969: 968: 963: 961: 960: 944: 942: 941: 936: 924: 922: 921: 916: 904: 902: 901: 896: 894: 893: 877: 875: 874: 869: 857: 855: 854: 849: 834: 832: 831: 826: 821: 820: 811: 810: 798: 797: 788: 787: 771: 769: 768: 763: 758: 753: 752: 751: 735: 730: 729: 709: 707: 706: 701: 699: 694: 693: 692: 676: 671: 670: 654: 652: 651: 646: 644: 643: 628: 627: 605: 603: 602: 597: 585: 583: 582: 577: 562: 560: 559: 554: 552: 551: 539: 538: 511: 510: 477: 476: 461: 460: 435: 433: 432: 427: 415: 413: 412: 407: 399: 398: 362: 360: 359: 354: 352: 351: 333: 331: 330: 325: 310: 308: 307: 302: 271:spectral theorem 185:spectral theorem 114: 107: 103: 100: 94: 92: 51: 27: 19: 4535: 4534: 4530: 4529: 4528: 4526: 4525: 4524: 4520:Operator theory 4505: 4504: 4503: 4498: 4480: 4444:Advanced topics 4439: 4363: 4342: 4301: 4267:Hilbert–Schmidt 4240: 4231:Gelfand–Naimark 4178: 4128: 4063: 4049: 4019: 4014: 4007:Segal–Bargmann 3975: 3946:Hilbert–Schmidt 3936:Densely defined 3919: 3888: 3862: 3818: 3813: 3783: 3778: 3739:Spectral method 3724:Ramanujan graph 3672: 3656: 3632:Fredholm theory 3600: 3595:Shilov boundary 3591:Structure space 3569:Generalizations 3564: 3555:Numerical range 3533: 3517:Uniform algebra 3479: 3455:Riesz projector 3440:Min-max theorem 3423: 3409:Direct integral 3365: 3351:Spectral radius 3322: 3277: 3231: 3222:Spectral radius 3170: 3164:Spectral theory 3161: 3131: 3130: 3122: 3118: 3113:Wayback Machine 3102:Wayback Machine 3092: 3088: 3083: 3079: 3070: 3068: 3064: 3057: 3051: 3047: 3014: 3010: 3001: 2999: 2992: 2976: 2969: 2961: 2957: 2935: 2931: 2926: 2921: 2920: 2907: 2903: 2898: 2880: 2844: 2813: 2809: 2800: 2799: 2781: 2780: 2778: 2775: 2774: 2744: 2740: 2720: 2717: 2716: 2705:equals that of 2671: 2667: 2652: 2648: 2646: 2643: 2642: 2632: 2599: 2570: 2566: 2564: 2561: 2560: 2557:bilateral shift 2531: 2530: 2518: 2517: 2502: 2498: 2489: 2485: 2473: 2469: 2451: 2450: 2438: 2434: 2428: 2424: 2403: 2399: 2390: 2386: 2368: 2367: 2359: 2351: 2348: 2339: 2335: 2329: 2325: 2301: 2297: 2288: 2284: 2266: 2265: 2256: 2252: 2246: 2242: 2233: 2229: 2208: 2204: 2195: 2191: 2173: 2172: 2163: 2159: 2153: 2149: 2140: 2135: 2110: 2106: 2097: 2092: 2070: 2069: 2060: 2056: 2050: 2046: 2040: 2036: 2027: 2023: 2002: 1998: 1992: 1988: 1979: 1975: 1957: 1956: 1945: 1941: 1935: 1931: 1925: 1921: 1912: 1908: 1899: 1895: 1889: 1885: 1876: 1872: 1871: 1867: 1854: 1845: 1841: 1825: 1823: 1820: 1819: 1795: 1794: 1785: 1781: 1775: 1771: 1765: 1761: 1752: 1748: 1739: 1735: 1729: 1725: 1716: 1712: 1703: 1702: 1696: 1692: 1686: 1682: 1673: 1669: 1660: 1655: 1654: 1642: 1638: 1629: 1628: 1622: 1618: 1612: 1608: 1602: 1598: 1592: 1588: 1579: 1574: 1573: 1561: 1557: 1550: 1544: 1540: 1533: 1531: 1528: 1527: 1497: 1491: 1480: 1466: 1460: 1449: 1442: 1438: 1431: 1424: 1417: 1411: 1393: 1387: 1369: 1332: 1317:spectral radius 1291: 1286: 1267: 1262: 1256: 1253: 1252: 1232: 1228: 1213: 1209: 1207: 1204: 1203: 1187: 1184: 1183: 1166: 1162: 1160: 1157: 1156: 1139: 1135: 1133: 1130: 1129: 1093: 1089: 1087: 1084: 1083: 1062: 1060: 1057: 1056: 1040: 1037: 1036: 1020: 1017: 1016: 997: 994: 993: 977: 974: 973: 956: 952: 950: 947: 946: 930: 927: 926: 910: 907: 906: 889: 885: 883: 880: 879: 863: 860: 859: 843: 840: 839: 816: 812: 806: 802: 793: 789: 783: 779: 777: 774: 773: 747: 743: 736: 734: 725: 721: 715: 712: 711: 688: 684: 677: 675: 666: 662: 660: 657: 656: 639: 635: 623: 619: 611: 608: 607: 591: 588: 587: 571: 568: 567: 547: 543: 534: 530: 506: 502: 472: 468: 456: 452: 441: 438: 437: 421: 418: 417: 394: 390: 370: 367: 366: 347: 343: 341: 338: 337: 319: 316: 315: 296: 293: 292: 267: 148:linear operator 131:normal operator 115: 104: 98: 95: 52: 50: 40: 28: 17: 12: 11: 5: 4533: 4523: 4522: 4517: 4500: 4499: 4497: 4496: 4485: 4482: 4481: 4479: 4478: 4473: 4468: 4463: 4461:Choquet theory 4458: 4453: 4447: 4445: 4441: 4440: 4438: 4437: 4427: 4422: 4417: 4412: 4407: 4402: 4397: 4392: 4387: 4382: 4377: 4371: 4369: 4365: 4364: 4362: 4361: 4356: 4350: 4348: 4344: 4343: 4341: 4340: 4335: 4330: 4325: 4320: 4315: 4313:Banach algebra 4309: 4307: 4303: 4302: 4300: 4299: 4294: 4289: 4284: 4279: 4274: 4269: 4264: 4259: 4254: 4248: 4246: 4242: 4241: 4239: 4238: 4236:Banach–Alaoglu 4233: 4228: 4223: 4218: 4213: 4208: 4203: 4198: 4192: 4190: 4184: 4183: 4180: 4179: 4177: 4176: 4171: 4166: 4164:Locally convex 4161: 4147: 4142: 4136: 4134: 4130: 4129: 4127: 4126: 4121: 4116: 4111: 4106: 4101: 4096: 4091: 4086: 4081: 4075: 4069: 4065: 4064: 4048: 4047: 4040: 4033: 4025: 4016: 4015: 4013: 4012: 4004: 3998:compact & 3983: 3981: 3977: 3976: 3974: 3973: 3968: 3963: 3958: 3953: 3948: 3943: 3941:Hermitian form 3938: 3933: 3927: 3925: 3921: 3920: 3918: 3917: 3907: 3902: 3896: 3894: 3890: 3889: 3887: 3886: 3881: 3876: 3870: 3868: 3864: 3863: 3861: 3860: 3855: 3850: 3841: 3832: 3826: 3824: 3823:Basic concepts 3820: 3819: 3816:Hilbert spaces 3812: 3811: 3804: 3797: 3789: 3780: 3779: 3777: 3776: 3771: 3766: 3761: 3756: 3751: 3746: 3741: 3736: 3731: 3726: 3721: 3716: 3711: 3706: 3701: 3691: 3689:Corona theorem 3686: 3680: 3678: 3674: 3673: 3671: 3670: 3668:Wiener algebra 3664: 3662: 3658: 3657: 3655: 3654: 3649: 3644: 3639: 3634: 3629: 3624: 3619: 3614: 3608: 3606: 3602: 3601: 3599: 3598: 3588: 3586:Pseudospectrum 3583: 3578: 3576:Dirac spectrum 3572: 3570: 3566: 3565: 3563: 3562: 3557: 3552: 3547: 3541: 3539: 3535: 3534: 3532: 3531: 3530: 3529: 3519: 3514: 3509: 3504: 3499: 3493: 3487: 3485: 3481: 3480: 3478: 3477: 3472: 3467: 3462: 3457: 3452: 3447: 3442: 3437: 3431: 3429: 3425: 3424: 3422: 3421: 3416: 3411: 3406: 3401: 3396: 3395: 3394: 3389: 3384: 3373: 3371: 3367: 3366: 3364: 3363: 3358: 3353: 3348: 3343: 3338: 3332: 3330: 3324: 3323: 3321: 3320: 3315: 3307: 3299: 3291: 3285: 3283: 3279: 3278: 3276: 3275: 3270: 3265: 3260: 3255: 3250: 3245: 3239: 3237: 3233: 3232: 3230: 3229: 3227:Operator space 3224: 3219: 3214: 3209: 3204: 3199: 3194: 3189: 3187:Banach algebra 3184: 3178: 3176: 3175:Basic concepts 3172: 3171: 3160: 3159: 3152: 3145: 3137: 3129: 3128: 3124:John B. Conway 3116: 3086: 3077: 3045: 3008: 2990: 2967: 2965:, p. 317. 2955: 2943:Linear algebra 2928: 2927: 2925: 2922: 2919: 2918: 2900: 2899: 2897: 2894: 2893: 2892: 2886: 2879: 2876: 2875: 2874: 2869: 2864: 2859: 2854: 2843: 2842:Generalization 2840: 2836: 2835: 2824: 2821: 2816: 2812: 2808: 2803: 2798: 2795: 2792: 2789: 2784: 2768: 2767: 2755: 2752: 2747: 2743: 2739: 2736: 2733: 2730: 2727: 2724: 2691: 2690: 2679: 2674: 2670: 2666: 2663: 2660: 2655: 2651: 2631: 2628: 2598: 2595: 2573: 2569: 2545: 2544: 2529: 2526: 2523: 2521: 2519: 2516: 2513: 2510: 2505: 2501: 2497: 2492: 2488: 2484: 2481: 2476: 2472: 2468: 2465: 2462: 2459: 2456: 2454: 2452: 2449: 2446: 2441: 2437: 2431: 2427: 2423: 2420: 2417: 2414: 2411: 2406: 2402: 2398: 2393: 2389: 2385: 2382: 2379: 2376: 2373: 2371: 2369: 2366: 2358: 2350: 2347: 2342: 2338: 2332: 2328: 2324: 2321: 2318: 2315: 2312: 2309: 2304: 2300: 2296: 2291: 2287: 2283: 2280: 2277: 2274: 2271: 2269: 2267: 2264: 2259: 2255: 2249: 2245: 2241: 2236: 2232: 2228: 2225: 2222: 2219: 2216: 2211: 2207: 2203: 2198: 2194: 2190: 2187: 2184: 2181: 2178: 2176: 2174: 2171: 2166: 2162: 2156: 2152: 2148: 2143: 2138: 2134: 2130: 2127: 2124: 2121: 2118: 2113: 2109: 2105: 2100: 2095: 2091: 2087: 2084: 2081: 2078: 2075: 2073: 2071: 2068: 2063: 2059: 2053: 2049: 2043: 2039: 2035: 2030: 2026: 2022: 2019: 2016: 2013: 2010: 2005: 2001: 1995: 1991: 1987: 1982: 1978: 1974: 1971: 1968: 1965: 1962: 1960: 1958: 1954: 1948: 1944: 1938: 1934: 1928: 1924: 1920: 1915: 1911: 1907: 1902: 1898: 1892: 1888: 1884: 1879: 1875: 1870: 1866: 1863: 1860: 1857: 1855: 1853: 1848: 1844: 1840: 1837: 1834: 1831: 1828: 1827: 1809: 1808: 1793: 1788: 1784: 1778: 1774: 1768: 1764: 1760: 1755: 1751: 1747: 1742: 1738: 1732: 1728: 1724: 1719: 1715: 1711: 1708: 1706: 1704: 1699: 1695: 1689: 1685: 1681: 1676: 1672: 1668: 1663: 1658: 1653: 1650: 1645: 1641: 1637: 1634: 1632: 1630: 1625: 1621: 1615: 1611: 1605: 1601: 1595: 1591: 1587: 1582: 1577: 1572: 1569: 1564: 1560: 1556: 1553: 1551: 1547: 1543: 1539: 1536: 1535: 1495: 1487: 1478: 1464: 1456: 1447: 1440: 1436: 1429: 1422: 1415: 1407: 1391: 1383: 1367: 1331: 1328: 1309: 1308: 1294: 1289: 1285: 1281: 1278: 1275: 1270: 1265: 1261: 1240: 1235: 1231: 1227: 1224: 1221: 1216: 1212: 1191: 1169: 1165: 1142: 1138: 1101: 1096: 1092: 1069: 1066: 1044: 1024: 1004: 1001: 981: 959: 955: 934: 914: 892: 888: 867: 847: 836: 835: 824: 819: 815: 809: 805: 801: 796: 792: 786: 782: 761: 756: 750: 746: 742: 739: 733: 728: 724: 719: 697: 691: 687: 683: 680: 674: 669: 665: 642: 638: 634: 631: 626: 622: 618: 615: 606:is written as 595: 575: 564: 550: 546: 542: 537: 533: 529: 526: 523: 520: 517: 514: 509: 505: 501: 498: 495: 492: 489: 486: 483: 480: 475: 471: 467: 464: 459: 455: 451: 448: 445: 425: 405: 402: 397: 393: 389: 386: 383: 380: 377: 374: 364: 350: 346: 335: 323: 300: 266: 263: 251: 250: 228: 218:skew-Hermitian 215: 202: 117: 116: 31: 29: 22: 15: 9: 6: 4: 3: 2: 4532: 4521: 4518: 4516: 4513: 4512: 4510: 4495: 4487: 4486: 4483: 4477: 4474: 4472: 4469: 4467: 4466:Weak topology 4464: 4462: 4459: 4457: 4454: 4452: 4449: 4448: 4446: 4442: 4435: 4431: 4428: 4426: 4423: 4421: 4418: 4416: 4413: 4411: 4408: 4406: 4403: 4401: 4398: 4396: 4393: 4391: 4390:Index theorem 4388: 4386: 4383: 4381: 4378: 4376: 4373: 4372: 4370: 4366: 4360: 4357: 4355: 4352: 4351: 4349: 4347:Open problems 4345: 4339: 4336: 4334: 4331: 4329: 4326: 4324: 4321: 4319: 4316: 4314: 4311: 4310: 4308: 4304: 4298: 4295: 4293: 4290: 4288: 4285: 4283: 4280: 4278: 4275: 4273: 4270: 4268: 4265: 4263: 4260: 4258: 4255: 4253: 4250: 4249: 4247: 4243: 4237: 4234: 4232: 4229: 4227: 4224: 4222: 4219: 4217: 4214: 4212: 4209: 4207: 4204: 4202: 4199: 4197: 4194: 4193: 4191: 4189: 4185: 4175: 4172: 4170: 4167: 4165: 4162: 4159: 4155: 4151: 4148: 4146: 4143: 4141: 4138: 4137: 4135: 4131: 4125: 4122: 4120: 4117: 4115: 4112: 4110: 4107: 4105: 4102: 4100: 4097: 4095: 4092: 4090: 4087: 4085: 4082: 4080: 4077: 4076: 4073: 4070: 4066: 4061: 4057: 4053: 4046: 4041: 4039: 4034: 4032: 4027: 4026: 4023: 4011: 4010: 4005: 4003: 4001: 3997: 3993: 3989: 3985: 3984: 3982: 3978: 3972: 3969: 3967: 3964: 3962: 3959: 3957: 3954: 3952: 3949: 3947: 3944: 3942: 3939: 3937: 3934: 3932: 3929: 3928: 3926: 3922: 3915: 3911: 3908: 3906: 3903: 3901: 3898: 3897: 3895: 3893:Other results 3891: 3885: 3882: 3880: 3877: 3875: 3872: 3871: 3869: 3865: 3859: 3856: 3854: 3851: 3849: 3845: 3844:Hilbert space 3842: 3840: 3836: 3835:Inner product 3833: 3831: 3828: 3827: 3825: 3821: 3817: 3810: 3805: 3803: 3798: 3796: 3791: 3790: 3787: 3775: 3772: 3770: 3767: 3765: 3762: 3760: 3757: 3755: 3752: 3750: 3747: 3745: 3742: 3740: 3737: 3735: 3732: 3730: 3727: 3725: 3722: 3720: 3717: 3715: 3712: 3710: 3707: 3705: 3702: 3699: 3695: 3692: 3690: 3687: 3685: 3682: 3681: 3679: 3675: 3669: 3666: 3665: 3663: 3659: 3653: 3650: 3648: 3645: 3643: 3640: 3638: 3635: 3633: 3630: 3628: 3625: 3623: 3620: 3618: 3615: 3613: 3610: 3609: 3607: 3605:Miscellaneous 3603: 3596: 3592: 3589: 3587: 3584: 3582: 3579: 3577: 3574: 3573: 3571: 3567: 3561: 3558: 3556: 3553: 3551: 3548: 3546: 3543: 3542: 3540: 3536: 3528: 3525: 3524: 3523: 3520: 3518: 3515: 3513: 3510: 3508: 3505: 3503: 3500: 3498: 3494: 3492: 3489: 3488: 3486: 3482: 3476: 3473: 3471: 3468: 3466: 3463: 3461: 3458: 3456: 3453: 3451: 3448: 3446: 3443: 3441: 3438: 3436: 3433: 3432: 3430: 3426: 3420: 3417: 3415: 3412: 3410: 3407: 3405: 3402: 3400: 3397: 3393: 3390: 3388: 3385: 3383: 3380: 3379: 3378: 3375: 3374: 3372: 3370:Decomposition 3368: 3362: 3359: 3357: 3354: 3352: 3349: 3347: 3344: 3342: 3339: 3337: 3334: 3333: 3331: 3329: 3325: 3319: 3316: 3314: 3311: 3308: 3306: 3303: 3300: 3298: 3295: 3292: 3290: 3287: 3286: 3284: 3280: 3274: 3271: 3269: 3266: 3264: 3261: 3259: 3256: 3254: 3251: 3249: 3246: 3244: 3241: 3240: 3238: 3234: 3228: 3225: 3223: 3220: 3218: 3215: 3213: 3210: 3208: 3205: 3203: 3200: 3198: 3195: 3193: 3190: 3188: 3185: 3183: 3180: 3179: 3177: 3173: 3169: 3165: 3158: 3153: 3151: 3146: 3144: 3139: 3138: 3135: 3125: 3120: 3114: 3110: 3107: 3103: 3099: 3096: 3090: 3081: 3063: 3056: 3049: 3041: 3037: 3033: 3029: 3025: 3021: 3020: 3012: 2997: 2993: 2987: 2983: 2982: 2974: 2972: 2964: 2959: 2952: 2948: 2944: 2940: 2933: 2929: 2915: 2911: 2905: 2901: 2890: 2887: 2885: 2882: 2881: 2873: 2870: 2868: 2865: 2863: 2860: 2858: 2855: 2853: 2850: 2849: 2848: 2839: 2822: 2814: 2810: 2796: 2790: 2773: 2772: 2771: 2750: 2745: 2741: 2734: 2728: 2725: 2715: 2714: 2713: 2710: 2708: 2704: 2700: 2696: 2677: 2672: 2668: 2664: 2661: 2658: 2653: 2649: 2641: 2640: 2639: 2637: 2627: 2625: 2620: 2617: 2615: 2611: 2607: 2602: 2594: 2592: 2587: 2571: 2567: 2558: 2554: 2550: 2527: 2524: 2522: 2508: 2503: 2499: 2495: 2490: 2486: 2482: 2474: 2470: 2463: 2460: 2457: 2455: 2444: 2439: 2435: 2429: 2425: 2418: 2415: 2412: 2404: 2400: 2396: 2391: 2387: 2380: 2377: 2374: 2372: 2364: 2356: 2340: 2336: 2330: 2326: 2322: 2316: 2313: 2310: 2302: 2298: 2294: 2289: 2285: 2278: 2275: 2272: 2270: 2257: 2253: 2247: 2243: 2239: 2234: 2230: 2223: 2220: 2217: 2209: 2205: 2201: 2196: 2192: 2185: 2182: 2179: 2177: 2164: 2160: 2154: 2150: 2146: 2141: 2136: 2132: 2125: 2122: 2119: 2111: 2107: 2103: 2098: 2093: 2089: 2082: 2079: 2076: 2074: 2061: 2057: 2051: 2047: 2041: 2037: 2033: 2028: 2024: 2017: 2014: 2011: 2003: 1999: 1993: 1989: 1985: 1980: 1976: 1969: 1966: 1963: 1961: 1952: 1946: 1942: 1936: 1932: 1926: 1922: 1918: 1913: 1909: 1905: 1900: 1896: 1890: 1886: 1882: 1877: 1873: 1868: 1864: 1861: 1858: 1856: 1846: 1842: 1838: 1832: 1829: 1818: 1817: 1816: 1814: 1791: 1786: 1782: 1776: 1772: 1766: 1762: 1758: 1753: 1749: 1745: 1740: 1736: 1730: 1726: 1722: 1717: 1713: 1709: 1707: 1697: 1693: 1687: 1683: 1674: 1670: 1666: 1661: 1648: 1643: 1639: 1635: 1633: 1623: 1619: 1613: 1609: 1603: 1593: 1589: 1585: 1580: 1567: 1562: 1558: 1554: 1552: 1545: 1541: 1537: 1526: 1525: 1524: 1522: 1518: 1514: 1513:inner product 1510: 1506: 1502: 1498: 1490: 1486: 1482: 1474: 1469: 1467: 1459: 1455: 1451: 1443: 1432: 1425: 1418: 1410: 1406: 1402: 1398: 1394: 1386: 1382: 1378: 1374: 1370: 1363: 1359: 1357: 1353: 1349: 1345: 1341: 1337: 1327: 1325: 1320: 1318: 1314: 1292: 1287: 1283: 1279: 1276: 1273: 1268: 1263: 1259: 1238: 1233: 1229: 1225: 1222: 1219: 1214: 1210: 1189: 1167: 1163: 1140: 1136: 1127: 1126: 1125: 1123: 1118: 1116: 1099: 1094: 1090: 1064: 1042: 1022: 1002: 999: 979: 957: 953: 932: 912: 890: 886: 865: 845: 822: 817: 813: 807: 803: 799: 794: 790: 784: 780: 759: 754: 748: 744: 740: 737: 731: 726: 722: 717: 695: 689: 685: 681: 678: 672: 667: 663: 640: 636: 632: 629: 624: 620: 616: 613: 593: 573: 565: 548: 540: 535: 531: 524: 518: 515: 512: 507: 503: 499: 493: 487: 484: 481: 478: 473: 469: 462: 457: 449: 446: 423: 400: 395: 391: 384: 378: 375: 365: 348: 344: 336: 321: 314: 313: 312: 298: 289: 287: 283: 280: 276: 272: 262: 260: 256: 255:normal matrix 248: 244: 240: 236: 232: 229: 227: 223: 219: 216: 214: 210: 206: 203: 201: 197: 193: 190: 189: 188: 186: 181: 179: 175: 171: 168: 164: 160: 156: 152: 149: 146: 142: 139: 138:Hilbert space 136: 132: 128: 125:, especially 124: 113: 110: 102: 91: 88: 84: 81: 77: 74: 70: 67: 63: 60: â€“  59: 55: 54:Find sources: 48: 44: 38: 37: 32:This article 30: 26: 21: 20: 4456:Balanced set 4430:Distribution 4368:Applications 4271: 4221:Krein–Milman 4206:Closed graph 4008: 3999: 3995: 3991: 3987: 3956:Self-adjoint 3950: 3867:Main results 3677:Applications 3507:Disk algebra 3361:Spectral gap 3296: 3236:Main results 3119: 3089: 3080: 3069:. Retrieved 3048: 3023: 3017: 3011: 3000:. Retrieved 2980: 2958: 2942: 2932: 2904: 2845: 2837: 2769: 2711: 2706: 2702: 2698: 2694: 2692: 2635: 2633: 2621: 2618: 2613: 2609: 2605: 2603: 2600: 2588: 2552: 2546: 1810: 1520: 1516: 1508: 1504: 1500: 1493: 1488: 1484: 1476: 1472: 1470: 1462: 1457: 1453: 1445: 1434: 1427: 1420: 1413: 1408: 1404: 1400: 1396: 1389: 1384: 1380: 1376: 1372: 1365: 1361: 1360: 1355: 1351: 1347: 1343: 1339: 1335: 1333: 1321: 1310: 1119: 837: 290: 268: 258: 252: 246: 242: 238: 234: 225: 221: 212: 208: 199: 195: 182: 177: 173: 169: 158: 154: 150: 140: 130: 120: 105: 96: 86: 79: 72: 65: 53: 41:Please help 36:verification 33: 4385:Heat kernel 4375:Hardy space 4282:Trace class 4196:Hahn–Banach 4158:Topological 3966:Trace class 3704:Heat kernel 3404:Compression 3289:Isospectral 3026:: 337–340. 2604:An element 1399:stabilizes 220:operators: 172:, that is: 123:mathematics 4509:Categories 4318:C*-algebra 4133:Properties 3382:Continuous 3197:C*-algebra 3192:B*-algebra 3106:Uniqueness 3071:2011-07-01 3002:2021-06-26 2939:Kunze, Ray 2924:References 2912:of, e.g., 2857:Normaloids 2624:C*-algebra 1499:). Since ( 363:is normal. 334:is normal. 265:Properties 145:continuous 69:newspapers 4292:Unbounded 4287:Transpose 4245:Operators 4174:Separable 4169:Reflexive 4154:Algebraic 4140:Barrelled 3168:-algebras 3095:Existence 3040:124945750 2815:∗ 2754:‖ 2746:∗ 2738:‖ 2732:‖ 2723:‖ 2673:∗ 2654:∗ 2568:ℓ 2504:∗ 2496:− 2491:∗ 2464:⁡ 2440:∗ 2419:⁡ 2413:− 2405:∗ 2381:⁡ 2341:∗ 2317:⁡ 2311:− 2303:∗ 2279:⁡ 2258:∗ 2224:⁡ 2218:− 2210:∗ 2186:⁡ 2165:∗ 2126:⁡ 2120:− 2112:∗ 2083:⁡ 2052:∗ 2018:⁡ 2012:− 1994:∗ 1970:⁡ 1937:∗ 1906:− 1891:∗ 1865:⁡ 1847:∗ 1833:⁡ 1777:∗ 1746:− 1731:∗ 1688:∗ 1667:− 1614:∗ 1586:− 1546:∗ 1293:∗ 1269:∗ 1095:∗ 1068:¯ 1065:λ 1023:λ 891:∗ 749:∗ 741:− 690:∗ 545:‖ 536:∗ 528:‖ 522:⟩ 508:∗ 497:⟨ 491:⟩ 474:∗ 466:⟨ 454:‖ 444:‖ 404:‖ 396:∗ 388:‖ 382:‖ 373:‖ 349:⋆ 241:for some 165:with its 99:June 2011 4494:Category 4306:Algebras 4188:Theorems 4145:Complete 4114:Schwartz 4060:glossary 3980:Examples 3769:Weyl law 3714:Lax pair 3661:Examples 3495:With an 3414:Discrete 3392:Residual 3328:Spectrum 3313:operator 3305:operator 3297:operator 3212:Spectrum 3109:Archived 3098:Archived 3062:Archived 2996:Archived 2941:(1971), 2878:See also 1511:) is an 1426:= 0, or 992:for any 416:for all 163:commutes 153: : 4297:Unitary 4277:Nuclear 4262:Compact 4257:Bounded 4252:Adjoint 4226:Min–max 4119:Sobolev 4104:Nuclear 4094:Hilbert 4089:FrĂ©chet 4054: ( 3994:) with 3971:Unitary 3830:Adjoint 3310:Unitary 2951:0276251 1507:) ↩ tr( 1468:) = 0. 135:complex 83:scholar 4272:Normal 4109:Orlicz 4099:Hölder 4079:Banach 4068:Spaces 4056:topics 3951:Normal 3294:Normal 3038:  2988:  2949:  1362:Proof. 85:  78:  71:  64:  56:  4084:Besov 4002:<∞ 3387:Point 3065:(PDF) 3058:(PDF) 3036:S2CID 2896:Notes 2770:with 1813:trace 1338:on a 1251:then 772:then 655:with 436:(use 284:) is 161:that 143:is a 133:on a 90:JSTOR 76:books 4432:(or 4150:Dual 3924:Maps 3846:and 3837:and 3318:Unit 3166:and 2986:ISBN 1471:Let 1364:Let 1315:and 1155:and 878:and 710:and 291:Let 273:. A 245:(so 129:, a 62:news 3028:doi 2707:NN* 2703:N*N 2614:x*x 2610:xx* 2553:AB* 1521:XX* 1509:AB* 1379:is 1128:If 838:If 239:MM* 224:= − 178:N*N 174:NN* 121:In 45:by 4511:: 4058:– 3104:, 3060:. 3034:. 3024:14 3022:. 2994:. 2970:^ 2947:MR 2695:N* 2626:. 2616:. 2612:= 2593:. 2528:0. 2461:tr 2416:tr 2378:tr 2314:tr 2276:tr 2221:tr 2183:tr 2123:tr 2080:tr 2015:tr 1967:tr 1862:tr 1830:tr 1503:, 1475:= 1439:TP 1433:= 1428:TP 1421:TP 1326:. 1319:. 732::= 673::= 563:). 288:. 261:. 253:A 237:= 233:: 222:N* 211:= 209:N* 198:= 196:N* 194:: 180:. 176:= 170:N* 157:→ 4436:) 4160:) 4156:/ 4152:( 4062:) 4044:e 4037:t 4030:v 4009:F 4000:n 3996:K 3992:K 3990:( 3988:C 3916:) 3912:( 3808:e 3801:t 3794:v 3700:) 3696:( 3597:) 3593:( 3156:e 3149:t 3142:v 3074:. 3042:. 3030:: 3005:. 2823:. 2820:) 2811:N 2807:( 2802:D 2797:= 2794:) 2791:N 2788:( 2783:D 2751:x 2742:N 2735:= 2729:x 2726:N 2699:N 2678:. 2669:N 2665:N 2662:= 2659:N 2650:N 2636:N 2606:x 2572:2 2525:= 2515:) 2512:) 2509:T 2500:T 2487:T 2483:T 2480:( 2475:V 2471:P 2467:( 2458:= 2448:) 2445:T 2436:T 2430:V 2426:P 2422:( 2410:) 2401:T 2397:T 2392:V 2388:P 2384:( 2375:= 2365:V 2357:T 2346:) 2337:T 2331:V 2327:P 2323:T 2320:( 2308:) 2299:T 2295:T 2290:V 2286:P 2282:( 2273:= 2263:) 2254:T 2248:V 2244:P 2240:T 2235:V 2231:P 2227:( 2215:) 2206:T 2202:T 2197:V 2193:P 2189:( 2180:= 2170:) 2161:T 2155:V 2151:P 2147:T 2142:2 2137:V 2133:P 2129:( 2117:) 2108:T 2104:T 2099:2 2094:V 2090:P 2086:( 2077:= 2067:) 2062:V 2058:P 2048:T 2042:V 2038:P 2034:T 2029:V 2025:P 2021:( 2009:) 2004:V 2000:P 1990:T 1986:T 1981:V 1977:P 1973:( 1964:= 1953:) 1947:V 1943:P 1933:T 1927:V 1923:P 1919:T 1914:V 1910:P 1901:V 1897:P 1887:T 1883:T 1878:V 1874:P 1869:( 1859:= 1852:) 1843:X 1839:X 1836:( 1792:. 1787:V 1783:P 1773:T 1767:V 1763:P 1759:T 1754:V 1750:P 1741:V 1737:P 1727:T 1723:T 1718:V 1714:P 1710:= 1698:V 1694:P 1684:T 1680:) 1675:V 1671:P 1662:H 1657:1 1652:( 1649:T 1644:V 1640:P 1636:= 1624:V 1620:P 1610:T 1604:2 1600:) 1594:V 1590:P 1581:H 1576:1 1571:( 1568:T 1563:V 1559:P 1555:= 1542:X 1538:X 1517:H 1505:B 1501:A 1496:V 1494:P 1492:− 1489:H 1485:1 1483:( 1481:T 1479:V 1477:P 1473:X 1465:V 1463:P 1461:− 1458:H 1454:1 1452:( 1450:T 1448:V 1446:P 1441:V 1437:V 1435:P 1430:V 1423:V 1419:) 1416:V 1414:P 1412:− 1409:H 1405:1 1401:V 1397:T 1392:V 1390:P 1388:− 1385:H 1381:1 1377:V 1373:V 1368:V 1366:P 1356:T 1352:V 1348:V 1344:H 1336:T 1307:. 1288:2 1284:N 1280:A 1277:= 1274:A 1264:1 1260:N 1239:, 1234:2 1230:N 1226:A 1223:= 1220:A 1215:1 1211:N 1190:A 1168:2 1164:N 1141:1 1137:N 1100:. 1091:N 1043:N 1003:. 1000:k 980:N 958:k 954:N 933:N 913:N 887:N 866:N 846:N 823:. 818:1 814:T 808:2 804:T 800:= 795:2 791:T 785:1 781:T 760:, 755:2 745:T 738:T 727:2 723:T 718:i 696:2 686:T 682:+ 679:T 668:1 664:T 641:2 637:T 633:i 630:+ 625:1 621:T 617:= 614:T 594:T 574:T 549:2 541:x 532:T 525:= 519:x 516:, 513:x 504:T 500:T 494:= 488:x 485:, 482:x 479:T 470:T 463:= 458:2 450:x 447:T 424:x 401:x 392:T 385:= 379:x 376:T 345:T 322:T 299:T 259:C 247:N 243:M 235:N 226:N 213:N 200:N 159:H 155:H 151:N 141:H 112:) 106:( 101:) 97:( 87:· 80:· 73:· 66:· 39:.

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mathematics
functional analysis
complex
Hilbert space
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linear operator
commutes
Hermitian adjoint
spectral theorem
unitary operators
Hermitian operators
skew-Hermitian
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normal matrix
spectral theorem
compact normal operator
finite-dimensional
inner product space
unitarily diagonalizable

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