File:Belt trick 1.gif

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Belt_trick_1.gif(514 × 402 pixels, file size: 636 KB, MIME type: image/gif, looped, 102 frames, 1.0 s)

Summary

Description
English: An illustration of the belt trick, showing a homotopy between a one-parameter rotation through an angle of 4π in three dimensions and the identity rotation.
Date
Source Created in Mathematica 9.0 (source below)
Author Slawekb
Other versions
 Belt trick 1a.gif
Source
F1[s_, t_] = {{E^(2 \[Pi] I t), Tan[][Pi] s/2]}, {-Tan[][Pi] s/2], 
   E^(-2 \[Pi] I t)}};
F2[s_, t_] = (F1[s, t]/Sqrt[][][s, t]]);
F[s_, t_] = FullSimplify[][][s, 0].F2[s, t];
i = {{I, 0}, {0, -I}};
j = {{0, -1}, {1, 0}};
k = i.j;
Components[A_] := (1/2) {Tr[][i], 
   Tr[][j], Tr[][k]};
R[s_][t_] = 
  Transpose[][][][][s, t].i.ConjugateTranspose[][s, t]]]],
    FullSimplify[][][][s, t].j.ConjugateTranspose[][s, t]]]],
    FullSimplify[][][][s, t].k.ConjugateTranspose[][s, t]]]]}];
PlotRotation[R_] := 
 ParametricPlot3D[][t][[1]] t + R[t][[2]] s, {t, 0, 1}, {s, 0, 1/7.5}, 
  Boxed -> False, Axes -> False, PlotPoints -> 20, PlotRange -> All];
a = Table[][][s], {s, 0, 1, 0.02}];
Export["a.gif", a];

Licensing

Slawekb at English Wikipedia, the copyright holder of this work, hereby publishes it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
w:en:Creative Commons
attribution share alike
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Attribution: Slawekb at English Wikipedia
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Original upload log

The original description page was here. All following user names refer to en.wikipedia.
  • 2014-09-07 18:24 Slawekb 514×402× (651115 bytes) Reverted to version as of 17:13, 7 September 2014
  • 2014-09-07 17:14 Slawekb 550×441× (670939 bytes) Reverted to version as of 17:07, 7 September 2014
  • 2014-09-07 17:13 Slawekb 514×402× (651115 bytes) Trying again...
  • 2014-09-07 17:07 Slawekb 550×441× (670939 bytes) Trying again...
  • 2014-09-07 13:50 Slawekb 577×476× (646122 bytes) trying again...
  • 2014-09-07 12:14 Slawekb 599×494× (651769 bytes) Improved resolution, made image loop, and cropped.
  • 2014-09-06 19:22 Slawekb 360×349× (165290 bytes) Thickened the ribbon
  • 2014-09-06 14:57 Slawekb 360×349× (144404 bytes) Fixed bounding boxes. Improved mesh.
  • 2014-09-06 14:15 Slawekb 360×199× (151047 bytes) Uploading a self-made file using [[Wikipedia:File_Upload_Wizard|File Upload Wizard]]

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6 September 2014

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a2173c8b66c58bb775d35b1592a9b08683f8b946

651,115 byte

1.0200000000000007 second

402 pixel

514 pixel

File history

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Date/TimeThumbnailDimensionsUserComment
current19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017514 × 402 (636 KB)OgreBot(BOT): Reverting to most recent version before archival
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017550 × 441 (655 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-07 17:07:19 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017577 × 476 (631 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-07 13:50:13 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017599 × 494 (636 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-07 13:46:43 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017599 × 494 (636 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-07 13:45:34 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017599 × 494 (636 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-07 12:14:26 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017360 × 349 (161 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-06 19:22:26 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017360 × 349 (141 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-06 14:57:01 by Slawekb
19:35, 5 August 2017Thumbnail for version as of 19:35, 5 August 2017360 × 199 (148 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2014-09-06 14:15:26 by Slawekb
14:05, 15 June 2016Thumbnail for version as of 14:05, 15 June 2016514 × 402 (636 KB)Bruno Max Melo==Summary== {{Information |Description = An illustration of the belt trick, showing a homotopy between a one-parameter rotation through an angle of 4π in three dimensions and the identity rotation. |Source = Created in Mathematica 9.0 (source be...
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