Metamath Proof Explorer


Theorem wrdeqi

Description: Equality theorem for the set of words, inference form. (Contributed by AV, 23-May-2021)

Ref Expression
Hypothesis wrdeqi.1 S=T
Assertion wrdeqi WordS=WordT

Proof

Step Hyp Ref Expression
1 wrdeqi.1 S=T
2 wrdeq S=TWordS=WordT
3 1 2 ax-mp WordS=WordT