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Bernstein's constant

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214: 151: 253: 278: 170: 85: 225: 408: 403: 28: 328:
Varga, Richard S.; Carpenter, Amos J. (1987). "A conjecture of S. Bernstein in approximation theory".
49: 24: 357: 337: 8: 379: 341: 376: 349: 345: 308: 353: 397: 53: 20: 313: 161: 384: 292: 374: 63:) on the interval by real polynomials of no more than degree 209:{\displaystyle {\frac {1}{2{\sqrt {\pi }}}}=0.28209\dots \,.} 273: 146:{\displaystyle \beta =\lim _{n\to \infty }2nE_{2n}(f),\,} 219:
was disproven by Varga and Carpenter, who calculated
228: 173: 88: 247: 208: 145: 321: 395: 96: 327: 248:{\displaystyle \beta =0.280169499023\dots \,.} 160:, exists and is between 0.278 and 0.286. His 284: 265: 312: 290: 241: 202: 142: 19:, usually denoted by the Greek letter β ( 396: 375: 79:|, Bernstein showed that the limit 297:par des polynomes de degrés donnés" 293:"Sur la meilleure approximation de 13: 368: 106: 31:and is equal to 0.2801694990... . 14: 420: 350:10.1070/SM1987v057n02ABEH003086 136: 130: 103: 1: 258: 48:(ƒ) be the error of the best 34: 7: 29:Sergei Natanovich Bernstein 10: 425: 291:Bernstein, S.N. (1914). 409:Mathematical constants 380:"Bernstein's Constant" 249: 210: 147: 250: 211: 148: 50:uniform approximation 25:mathematical constant 226: 171: 158:Bernstein's constant 86: 17:Bernstein's constant 342:1987SbMat..57..547V 164:that the limit is: 404:Numerical analysis 377:Weisstein, Eric W. 330:Math. USSR Sbornik 314:10.1007/BF02401828 245: 206: 143: 110: 191: 188: 95: 67:. In the case of 416: 390: 389: 362: 361: 325: 319: 318: 316: 288: 282: 276: 269: 254: 252: 251: 246: 215: 213: 212: 207: 192: 190: 189: 184: 175: 152: 150: 149: 144: 129: 128: 109: 424: 423: 419: 418: 417: 415: 414: 413: 394: 393: 371: 369:Further reading 366: 365: 326: 322: 289: 285: 272: 270: 266: 261: 227: 224: 223: 183: 179: 174: 172: 169: 168: 121: 117: 99: 87: 84: 83: 75:) = | 47: 37: 12: 11: 5: 422: 412: 411: 406: 392: 391: 370: 367: 364: 363: 336:(2): 547–560. 320: 283: 263: 262: 260: 257: 256: 255: 244: 240: 237: 236:0.280169499023 234: 231: 217: 216: 205: 201: 198: 195: 187: 182: 178: 154: 153: 141: 138: 135: 132: 127: 124: 120: 116: 113: 108: 105: 102: 98: 94: 91: 43: 36: 33: 9: 6: 4: 3: 2: 421: 410: 407: 405: 402: 401: 399: 387: 386: 381: 378: 373: 372: 359: 355: 351: 347: 343: 339: 335: 331: 324: 315: 310: 306: 302: 298: 296: 287: 280: 275: 268: 264: 242: 238: 235: 232: 229: 222: 221: 220: 203: 199: 196: 193: 185: 180: 176: 167: 166: 165: 163: 159: 139: 133: 125: 122: 118: 114: 111: 100: 92: 89: 82: 81: 80: 78: 74: 70: 66: 62: 58: 55: 54:real function 51: 46: 42: 32: 30: 26: 22: 18: 383: 333: 329: 323: 304: 300: 294: 286: 267: 218: 157: 155: 76: 72: 68: 64: 60: 56: 44: 40: 38: 27:named after 16: 15: 398:Categories 271:(sequence 259:References 162:conjecture 35:Definition 385:MathWorld 301:Acta Math 239:… 230:β 200:… 186:π 107:∞ 104:→ 90:β 307:: 1–57. 23:), is a 358:0842399 338:Bibcode 277:in the 274:A073001 197:0.28209 156:called 356:  52:to a 279:OEIS 39:Let 21:beta 346:doi 309:doi 97:lim 400:: 382:. 354:MR 352:. 344:. 334:57 332:. 305:37 303:. 299:. 388:. 360:. 348:: 340:: 317:. 311:: 295:x 281:) 243:. 233:= 204:. 194:= 181:2 177:1 140:, 137:) 134:f 131:( 126:n 123:2 119:E 115:n 112:2 101:n 93:= 77:x 73:x 71:( 69:ƒ 65:n 61:x 59:( 57:ƒ 45:n 41:E

Index

beta
mathematical constant
Sergei Natanovich Bernstein
uniform approximation
real function
conjecture
A073001
OEIS
"Sur la meilleure approximation de x par des polynomes de degrés donnés"
doi
10.1007/BF02401828
Bibcode
1987SbMat..57..547V
doi
10.1070/SM1987v057n02ABEH003086
MR
0842399
Weisstein, Eric W.
"Bernstein's Constant"
MathWorld
Categories
Numerical analysis
Mathematical constants

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