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Theorem
is_subgroup.group_equiv_cosets_times_subgroup
Modification history
2018-04-11 14:49
group_theory/subgroup.lean
chore(group_theory): move order_of into its own file; base costes on left_coset
Deleted
is_subgroup.group_equiv_cosets_times_subgroup
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2018-03-10 13:38
group_theory/subgroup.lean
feat(group_theory): add a little bit of group theory; prove of Lagrange's theorem
Added
is_subgroup.group_equiv_cosets_times_subgroup
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