Mathlib v3 is deprecated. Go to Mathlib v4

Theorem equiv.perm.sign_inv

Modification history

2018-10-17 13:50
group_theory/perm.lean
feat(group_theory/perm): swap_mul_swal / swap_swap_apply (by @kckennylau)
Modified equiv.perm.sign_invView on Github →
2018-09-19 11:24
group_theory/perm.lean
feat(group_theory/perm): sign_cycle and sign_bij (#347)
Added equiv.perm.sign_invView on Github →