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This diagram was created with Mathematica

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

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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.)