I wonder if Universe with a positive curvature everywhere can be infinite.(adsbygoogle = window.adsbygoogle || []).push({});

As an example I see a spring: you make a full rotation, but you dont get into the same place, but another place.

Spring is 1-dimensional object (line) so curvature is not defined for it. But is it possible for the higher dimensional surfaces?

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# Closed but infinite space?

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