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Def derangements.at_most_one_fixed_point_equiv_sum_derangements

Modification history

2021-09-08 08:23
src/combinatorics/derangements/basic.lean
feat(data/equiv/derangements/basic): define derangements (#7526) …
Added derangements.at_most_one_fixed_point_equiv_sum_derangementsView on Github →