He writes:
Why are both terms equal to zero unless i = qj? I really don't understand what's happening here.
Edit: The ei,j terms, as usual, represent matrix units. The 'pi' and 'qj' refer to permutations of i and j.
2026-03-25 23:38:22.1774481902
Need some help understanding Artin 1.5.10 proof on the product of permutations.
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