simp_all only [neg_neg]
Q : Type u_2
K : Type u_1
inst✝¹ : AddGroup Q
inst✝ : AddGroup K
c : Q → Q → K
ccl : Cocycle c
q : Q
this : c (-q) (- -q) = -q +ᵥ c (- -q) (-q)
⊢ c (-q) q = -q +ᵥ c q (-q)
no goals