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Harish-Chandra character

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states that any invariant eigendistribution, and in particular any character of an irreducible unitary representation on a Hilbert space, is given by a
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that is invariant under conjugation, and is an eigendistribution of the center of the
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that is analogous to the character of a finite-dimensional representation of a
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Representation Theory of Semisimple Groups: An Overview Based on Examples.
338:, in other words an invariant eigendistribution, with eigenvalue the 297:{\displaystyle \Theta _{\pi }:f\mapsto \operatorname {Tr} (\pi (f))} 15: 250: 167: 296: 226: 227:{\displaystyle \pi (f)=\int _{G}f(x)\pi (x)\,dx} 43:but its sources remain unclear because it lacks 8: 255: 249: 217: 187: 166: 74:Learn how and when to remove this message 128:Suppose that π is an irreducible 7: 385:Representation theory of Lie groups 346:Harish-Chandra's regularity theorem 252: 14: 20: 342:of the representation π. 291: 288: 282: 276: 267: 214: 208: 202: 196: 177: 171: 1: 332:universal enveloping algebra 350:locally integrable function 94:, of a representation of a 401: 319:) of the representation. 317:Harish-Chandra character 88:Harish-Chandra character 29:This article includes a 340:infinitesimal character 241:, and the distribution 155:, then the operator on 58:more precise citations. 298: 228: 130:unitary representation 326:is a distribution on 299: 229: 322:The character Θ 248: 165: 96:semisimple Lie group 86:In mathematics, the 146:compactly supported 136:on a Hilbert space 294: 224: 31:list of references 84: 83: 76: 392: 313:global character 303: 301: 300: 295: 260: 259: 233: 231: 230: 225: 192: 191: 79: 72: 68: 65: 59: 54:this article by 45:inline citations 24: 23: 16: 400: 399: 395: 394: 393: 391: 390: 389: 375: 374: 358: 325: 251: 246: 245: 183: 163: 162: 149:smooth function 126: 80: 69: 63: 60: 49: 35:related reading 25: 21: 12: 11: 5: 398: 396: 388: 387: 377: 376: 373: 372: 357: 354: 323: 307:is called the 305: 304: 293: 290: 287: 284: 281: 278: 275: 272: 269: 266: 263: 258: 254: 235: 234: 223: 220: 216: 213: 210: 207: 204: 201: 198: 195: 190: 186: 182: 179: 176: 173: 170: 125: 122: 92:Harish-Chandra 90:, named after 82: 81: 39:external links 28: 26: 19: 13: 10: 9: 6: 4: 3: 2: 397: 386: 383: 382: 380: 371: 370:0-691-09089-0 367: 364: 361:A. W. Knapp, 360: 359: 355: 353: 351: 347: 343: 341: 337: 333: 329: 320: 318: 314: 310: 285: 279: 273: 270: 264: 261: 256: 244: 243: 242: 240: 221: 218: 211: 205: 199: 193: 188: 184: 180: 174: 168: 161: 160: 159: 158: 154: 151:on the group 150: 147: 143: 139: 135: 131: 123: 121: 119: 118:compact group 115: 112:on the group 111: 107: 104: 103:Hilbert space 100: 97: 93: 89: 78: 75: 67: 57: 53: 47: 46: 40: 36: 32: 27: 18: 17: 362: 344: 335: 327: 321: 316: 312: 308: 306: 236: 156: 152: 141: 137: 133: 127: 113: 110:distribution 105: 98: 87: 85: 70: 61: 50:Please help 42: 239:trace class 56:introducing 356:References 124:Definition 64:March 2024 309:character 280:π 274:⁡ 268:↦ 257:π 253:Θ 206:π 185:∫ 169:π 379:Category 52:improve 368:  324:π 237:is of 144:is a 140:. If 108:is a 101:on a 37:, or 366:ISBN 311:(or 334:of 315:or 132:of 381:: 352:. 271:Tr 120:. 41:, 33:, 336:G 328:G 292:) 289:) 286:f 283:( 277:( 265:f 262:: 222:x 219:d 215:) 212:x 209:( 203:) 200:x 197:( 194:f 189:G 181:= 178:) 175:f 172:( 157:H 153:G 142:f 138:H 134:G 114:G 106:H 99:G 77:) 71:( 66:) 62:( 48:.

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list of references
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Harish-Chandra
semisimple Lie group
Hilbert space
distribution
compact group
unitary representation
compactly supported
smooth function
trace class
universal enveloping algebra
infinitesimal character
Harish-Chandra's regularity theorem
locally integrable function
ISBN
0-691-09089-0
Category
Representation theory of Lie groups

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