Mathlib v3 is deprecated. Go to Mathlib v4

Theorem neg_neg_sub_neg

Modification history

2021-12-11 19:31
src/algebra/group/basic.lean
refactor(algebra/group/basic): Migrate add_comm_group section into comm_group section (#10565) …
Deleted neg_neg_sub_negView on Github →
2020-05-18 13:38
src/algebra/group/basic.lean
refactor(algebra): merge init_.algebra into algebra (#2707) …
Modified neg_neg_sub_negView on Github →
2020-05-17 17:58
src/init_/algebra/group.lean
chore(*): bump to lean-3.13.1 (#2697) …
Added neg_neg_sub_negView on Github →