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when toggle format what by license comment
Nov 16, 2020 at 21:46 history edited Jonathan Manton CC BY-SA 4.0
Added a postscript since the original question asked for a geometric meaning of the torsion-free requirement.
Nov 16, 2020 at 12:44 history edited Jonathan Manton CC BY-SA 4.0
added 97 characters in body
Nov 16, 2020 at 12:40 review First posts
Nov 16, 2020 at 12:42
Nov 16, 2020 at 12:39 history answered Jonathan Manton CC BY-SA 4.0