Transferred from en.wikipedia to Commons by Maksim.

 

This diagram was created with Mathematica.

Two alternate views of a cross-cap after being sliced open.

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Original upload log

Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version.

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• (del) (cur) 00:50, 20 April 2004 . . en:User:AugPi AugPi ( en:User_talk:AugPi Talk) . . 773x419 (61265 bytes) (Two alternate views of a cross-cap after being sliced open.)