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Nov 30, 2022 at 11:47 vote accept M. Winter
Nov 30, 2022 at 11:43 answer added M. Winter timeline score: 5
Oct 4, 2018 at 10:25 history edited M. Winter CC BY-SA 4.0
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Oct 3, 2018 at 8:20 comment added Gro-Tsen Just to give a trivial illustration, any arc-transitive simplex has edges all of the same length, so it is a regular simplex, so it has the full symmetric group as symmetries.
Oct 2, 2018 at 19:11 history edited YCor
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Oct 2, 2018 at 19:01 answer added David E Speyer timeline score: 5
Oct 2, 2018 at 16:43 history edited Martin Sleziak
removed the deprecated (geometry) tag - see the tag info: https://mathoverflow.net/tags/geometry/info; if there are some other geometry-related tags which are suitable, please use some of them instead
Oct 2, 2018 at 14:16 history edited M. Winter CC BY-SA 4.0
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Oct 2, 2018 at 14:16 comment added M. Winter @HenrikRüping Thank you for your comment. I hoped it would be clear from my explanation that arc-transitivity includes edge- and vertex-transitivity. Unfortunately a rhombus is not vertex-transitive. I will improve my post.
Oct 2, 2018 at 14:14 comment added HenrikRüping If automorphism means an isometry of the surrounding Euclidean space a Rhombus is an example.
Oct 2, 2018 at 13:39 history asked M. Winter CC BY-SA 4.0