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Commit 2021-12-03 08:57 55b64b61

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chore(group_theory/*): additivise! (#10557)

Estimated changes

Modified src/algebra/group_power/basic.lean

modified theorem mul_zpow_neg_one

Modified src/group_theory/coset.lean

modified theorem subgroup.card_comap_dvd_of_injective

modified theorem subgroup.card_dvd_of_injective

modified theorem subgroup.card_dvd_of_le

modified theorem subgroup.card_quotient_dvd_card

modified theorem subgroup.card_subgroup_dvd_card

Modified src/group_theory/specific_groups/cyclic.lean

deleted theorem card_pow_eq_one_eq_order_of_aux

added theorem is_add_cyclic.card_order_of_eq_totient

added theorem is_add_cyclic_of_card_pow_eq_one_le

Modified src/tactic/group.lean