rw [P.mul]
p q r : ℤ
fst snd : Fin 2
⊢ ((p, q, r), Q.c) * ((p, q, r), Q.c) = ((0, 0, r + r + 1), Q.e)
p q r : ℤ
fst snd : Fin 2
⊢ ((p, q, r) + ↑(action Q.c) (p, q, r) + cocycle Q.c Q.c, Q.c + Q.c) = ((0, 0, r + r + 1), Q.e)