Mathlib v3 is deprecated. Go to Mathlib v4

Theorem counterexample.mem_with_sign_neg_one

Modification history

2023-05-30 23:18
counterexamples/direct_sum_is_internal.lean
chore(archive + counterexamples): namespaces imo, theorems_100, counterexample, plus three more (#19129) …
Added counterexample.mem_with_sign_neg_oneView on Github →