Conceptual reason why the sign of a permutation is well-defined? (mathoverflow.net) 3 points by jdwg 2y ago ↗ HN
[–] jdwg 2y ago ↗ Professional mathematicians giving careful consideration to simple concepts: ~50 comments, 34 answers, and the question's still active! [–] 082349872349872 2y ago ↗ Cf https://mathoverflow.net/a/418137
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