Image:Sphere wrapped round itself.png

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Sphere_wrapped_round_itself.png‎ (378 × 356 pixels, file size: 36 KB, MIME type: image/png)

[edit] Summary

Illustration for Homotopy groups of spheres, π₂(S²)=Z. The equation is (rcos(θ)cos(φ),rcos(θ)sin(φ),sin(θ)), with r = 1 + aφ.

Made with SingSurf and JavaView, post processed with gimp/inkscape.

Author: R Morris

[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following licenses: 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. This file is licensed under the Creative Commons Attribution-ShareAlike license versions 3.0, 2.5, 2.0, and 1.0. You may select the license of your choice.

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