Topologic equivalence

    Visual demonstrarion of why a cup is topologically equivalent to a doughnut.

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    1. Sebastian- (62 months ago | reply)

      Hi, I'm an admin for a group called Exploratorium Geometry Playground, and we'd love to have your photo added to the group.

    2. ★

      Bollops added this photo to his favorites. (62 months ago)

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