Theorem: MetabelianGroup.left_id (UnitConjecture/MetabelianGroup.lean)

State before:
Q : Type u_2
K : Type u_1
inst✝¹ : AddGroup Q
inst✝ : AddCommGroup K
c : Q → Q → K
ccl : Cocycle c
k : K
q : Q
⊢ mul c e (k, q) = (k, q)
Tactic:
aesop (rule_sets [Cocycle, Metabelian])
State after:
no goals