Commit 2021-09-14 12:09 eb203909

refactor(group_theory/p_group): Move lemmas to is_p_group namespace (#9188) Moves card_modeq_card_fixed_points, nonempty_fixed_point_of_prime_not_dvd_card, and exists_fixed_point_of_prime_dvd_card_of_fixed_point to the is_p_group namespace. I think this simplifies things, since they already had explicit hG : is_p_group G hypotheses anyway.