Metamath Proof Explorer


Theorem submrcl

Description: Reverse closure for submonoids. (Contributed by Mario Carneiro, 7-Mar-2015)

Ref Expression
Assertion submrcl ⊢ S ∈ SubMnd ⁡ M → M ∈ Mnd

Proof

Step Hyp Ref Expression
1 df-submnd ⊢ SubMnd = s ∈ Mnd ⟼ t ∈ 𝒫 Base s | 0 s ∈ t ∧ ∀ x ∈ t ∀ y ∈ t x + s y ∈ t
2 1 mptrcl ⊢ S ∈ SubMnd ⁡ M → M ∈ Mnd