Metamath Proof Explorer


Theorem sdomdom

Description: Strict dominance implies dominance. (Contributed by NM, 10-Jun-1998)

Ref Expression
Assertion sdomdom ( 𝐴𝐵𝐴𝐵 )

Proof

Step Hyp Ref Expression
1 brsdom ( 𝐴𝐵 ↔ ( 𝐴𝐵 ∧ ¬ 𝐴𝐵 ) )
2 1 simplbi ( 𝐴𝐵𝐴𝐵 )