assumption
R : Type
inst✝² : Ring R
inst✝¹ : DecidableEq R
X : Type
inst✝ : DecidableEq X
s₁ s₂ : FormalSum R X
eqv : beq_quot (Quotient.mk (formalSumSetoid R X) s₁) (Quotient.mk (formalSumSetoid R X) s₂) = true
eql : Quotient.mk (formalSumSetoid R X) s₁ = Quotient.mk (formalSumSetoid R X) s₂ := of_decide_eq_true eqv
⊢ Quotient.mk (formalSumSetoid R X) s₁ = Quotient.mk (formalSumSetoid R X) s₂
no goals