This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer


Theorem s1cld

Description: A singleton word is a word. (Contributed by Mario Carneiro, 26-Feb-2016)

Ref Expression
Hypothesis s1cld.1 φ A B
Assertion s1cld φ ⟨“ A ”⟩ Word B

Proof

Step Hyp Ref Expression
1 s1cld.1 φ A B
2 s1cl A B ⟨“ A ”⟩ Word B
3 1 2 syl φ ⟨“ A ”⟩ Word B