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Talk:Unit disk

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81: 71: 53: 22: 482:, although Wolfram gives two solutions. Either the statement is false, or the author took a branch of the root. In either case I'm not sure what the policy on Knowledge (or its math community) is on how to correct such things, as the article obviously should not be bloated. 321:
I thought I clarified this, but apparently, I did not. According to the article mentioned in the External links section, it should be a metric that arises from a norm. I edited the article to make it at least a bit clearer. Thanks,
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I don't have an opinion on the move, but I can tell you these things go on forever and never settle down. You change it now, in half a year someone else will change it back.
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I'm not sure the paragraph about the perimeter is relevant to this article. As far as I know, perimeter is a property of the
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Okay, after the 8th or 9th re-reading, I begin to grasp the topic -- a little. I have had personal experience with the
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to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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If you have discovered URLs which were erroneously considered dead by the bot, you can report them with
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Yup, it was and is :-) So if the radius is 1, as is the case for the unit disc, you get an area of π.
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In 1932, S. Gołąb proved that the perimeter of the unit disc can take any value in between 6 and 8
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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before doing mass systematic removals. This message is updated dynamically through the template
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http://web.archive.org/web/20060907065432/http://www.math.poly.edu/%7Ealvarez/pdfs/disc.pdf
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I retract the rat, but boy, this article is opaque. Needs rewrite for general audience.
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If you found an error with any archives or the URLs themselves, you can fix them with
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i'm no matematician, nor math student at all, but wasn't the area of a circle πR² ?
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What is the precise statement of this theorem? I can easily give a metric on
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and the perimeter (defined as the unit disc's boundary) is therefore empty.
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is always in between 3 and 4. Hint: These values are attained when the
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What's the issue here? Is this a British vs. American English thing?
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Prove that the ratio of the circumference to the diameter of a
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When you have finished reviewing my changes, please set the
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for additional information. I made the following changes:
509: 417: 98:, a collaborative effort to improve the coverage of 568:using the archive tool instructions below. Editors 470: 132:This article has not yet received a rating on the 526:http://www.math.poly.edu/~alvarez/pdfs/disc.pdf 554:This message was posted before February 2018. 8: 471:{\displaystyle f(z)={\frac {z}{1-|z|^{2}}}} 19: 504:I have just modified one external link on 47: 459: 454: 445: 433: 416: 201:. Maybe you'll add it there instead? -- 49: 641:Unknown-priority mathematics articles 543:to let others know (documentation at 7: 92:This article is within the scope of 38:It is of interest to the following 14: 508:. Please take a moment to review 234:What seems to be the problem? -- 112:Knowledge:WikiProject Mathematics 636:Start-Class mathematics articles 379:uses British (k), and this one, 342:Should this article be moved to 115:Template:WikiProject Mathematics 79: 69: 51: 20: 455: 446: 427: 421: 1: 106:and see a list of open tasks. 307:whose unit disc is equal to 657: 585:(last update: 5 June 2024) 501:Hello fellow Wikipedians, 402:18:24, 29 April 2006 (UTC) 393:14:42, 29 April 2006 (UTC) 370:03:46, 29 April 2006 (UTC) 360:16:31, 28 April 2006 (UTC) 332:06:21, 18 April 2006 (UTC) 316:19:20, 16 April 2006 (UTC) 284:20:06, 24 April 2006 (UTC) 271:10:43, 24 April 2006 (UTC) 211:15:39, 24 March 2006 (UTC) 189:Perimeter: Disc or circle? 184:14:45, 23 March 2006 (UTC) 622:20:22, 20 July 2016 (UTC) 492:08:57, 2 March 2015 (UTC) 261:20:19, 7 April 2006 (UTC) 244:06:53, 6 April 2006 (UTC) 229:18:04, 5 April 2006 (UTC) 131: 64: 46: 411:The article states that 291: 134:project's priority scale 497:External links modified 95:WikiProject Mathematics 472: 346:to be consistent with 28:This article is rated 473: 566:regular verification 415: 118:mathematics articles 556:After February 2018 535:parameter below to 610:InternetArchiveBot 561:InternetArchiveBot 468: 377:Disk (mathematics) 348:Disk (mathematics) 87:Mathematics portal 34:content assessment 586: 466: 220:(was: Area = π?) 148: 147: 144: 143: 140: 139: 648: 620: 611: 584: 583: 562: 550: 477: 475: 474: 469: 467: 465: 464: 463: 458: 449: 434: 407:Inverse function 292:Golab's theorem? 120: 119: 116: 113: 110: 89: 84: 83: 73: 66: 65: 55: 48: 31: 25: 24: 16: 656: 655: 651: 650: 649: 647: 646: 645: 626: 625: 614: 609: 577: 570:have permission 560: 544: 514:this simple FaQ 499: 453: 438: 413: 412: 409: 340: 294: 218: 191: 153: 117: 114: 111: 108: 107: 85: 78: 32:on Knowledge's 29: 12: 11: 5: 654: 652: 644: 643: 638: 628: 627: 604: 603: 596: 529: 528: 520:Added archive 498: 495: 484:145.107.16.149 462: 457: 452: 448: 444: 441: 437: 432: 429: 426: 423: 420: 408: 405: 385:Meni Rosenfeld 373: 372: 352:Meni Rosenfeld 339: 336: 335: 334: 301: 300: 293: 290: 289: 288: 287: 286: 274: 273: 251:taxicab metric 247: 246: 236:Meni Rosenfeld 217: 214: 203:Meni Rosenfeld 197:, and not the 190: 187: 171:(i.e. for the 152: 149: 146: 145: 142: 141: 138: 137: 130: 124: 123: 121: 104:the discussion 91: 90: 74: 62: 61: 56: 44: 43: 37: 26: 13: 10: 9: 6: 4: 3: 2: 653: 642: 639: 637: 634: 633: 631: 624: 623: 618: 613: 612: 601: 597: 594: 590: 589: 588: 581: 575: 571: 567: 563: 557: 552: 548: 542: 538: 534: 527: 523: 519: 518: 517: 515: 511: 507: 502: 496: 494: 493: 489: 485: 481: 460: 450: 442: 439: 435: 430: 424: 418: 406: 404: 403: 400: 395: 394: 390: 386: 382: 378: 371: 368: 364: 363: 362: 361: 357: 353: 349: 345: 337: 333: 329: 325: 320: 319: 318: 317: 314: 310: 306: 299: 296: 295: 285: 282: 278: 277: 276: 275: 272: 269: 265: 264: 263: 262: 259: 254: 252: 245: 241: 237: 233: 232: 231: 230: 227: 223: 222:I smell a rat 215: 213: 212: 208: 204: 200: 196: 188: 186: 185: 182: 178: 174: 170: 166: 163:is a regular 162: 158: 150: 135: 129: 126: 125: 122: 105: 101: 97: 96: 88: 82: 77: 75: 72: 68: 67: 63: 60: 57: 54: 50: 45: 41: 35: 27: 23: 18: 17: 608: 605: 580:source check 559: 553: 540: 536: 532: 530: 503: 500: 410: 396: 374: 341: 324:Jitse Niesen 308: 304: 302: 297: 255: 250: 248: 221: 219: 192: 154: 93: 40:WikiProjects 547:Sourcecheck 195:unit circle 109:Mathematics 100:mathematics 59:Mathematics 30:Start-class 630:Categories 617:Report bug 600:this tool 593:this tool 506:Unit disk 480:bijective 399:AxelBoldt 381:Unit Disc 367:AxelBoldt 344:Unit disk 313:AxelBoldt 281:AxelBoldt 258:John Reid 226:John Reid 199:unit disc 161:unit disc 157:unit disc 606:Cheers.— 338:Spelling 173:sup norm 167:resp. a 151:Untitled 533:checked 510:my edit 165:hexagon 541:failed 216:Opaque 169:square 36:scale. 375:Yes, 350:? -- 175:). — 537:true 488:talk 389:talk 356:talk 328:talk 268:capi 240:talk 207:talk 181:Talk 574:RfC 551:). 539:or 524:to 478:is 177:MFH 128:??? 632:: 587:. 582:}} 578:{{ 549:}} 545:{{ 490:) 443:− 391:) 358:) 330:) 242:) 224:. 209:) 619:) 615:( 602:. 595:. 486:( 461:2 456:| 451:z 447:| 440:1 436:z 431:= 428:) 425:z 422:( 419:f 387:( 354:( 326:( 309:R 305:R 238:( 205:( 179:: 136:. 42::

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unit disc
unit disc
hexagon
square
sup norm
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Talk
14:45, 23 March 2006 (UTC)
unit circle
unit disc
Meni Rosenfeld
talk
15:39, 24 March 2006 (UTC)
John Reid
18:04, 5 April 2006 (UTC)
Meni Rosenfeld
talk

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