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Theorem equiv.sum_congr_symm

Modification history

2020-12-08 10:43
src/data/equiv/basic.lean
chore(group_theory/perm): Add alternate formulation of (sum|sigma)_congr lemmas (#5260) …
Modified equiv.sum_congr_symmView on Github →
2020-05-27 08:57
src/data/equiv/basic.lean
chore(data/equiv/basic): simplify some defs, add `coe` lemmas (#2835) …
Modified equiv.sum_congr_symmView on Github →
2019-09-17 18:02
src/data/equiv/basic.lean
feat(set_theory/game): the theory of combinatorial games (#1274) …
Added equiv.sum_congr_symmView on Github →