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Theorem is_subgroup.mul_image

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.mul_imageView on Github →
2018-04-10 13:02
group_theory/subgroup.lean
refactor(algebra): move is_submonoid to group_theory and base is_subgroup on is_submonoid
Modified is_subgroup.mul_imageView on Github →
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.mul_imageView on Github →