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Commit 2022-05-04 07:50 ba4bf545

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feat(set_theory/game/pgame): Add more congr lemmas (#13808)

Estimated changes

added theorem pgame.add_congr_left
added theorem pgame.add_congr_right
modified theorem pgame.equiv_refl
added theorem pgame.equiv_rfl
added theorem pgame.sub_congr_left
added theorem pgame.sub_congr_right