Metamath Proof Explorer


Theorem socnv

Description: The converse of a strict ordering is still a strict ordering. (Contributed by Scott Fenton, 13-Jun-2018)

Ref Expression
Assertion socnv R Or A R -1 Or A

Proof

Step Hyp Ref Expression
1 cnvso R Or A R -1 Or A
2 1 biimpi R Or A R -1 Or A