Metamath Proof Explorer


Theorem abrexdom2jm

Description: An indexed set is dominated by the indexing set. (Contributed by Jeff Madsen, 2-Sep-2009)

Ref Expression
Assertion abrexdom2jm A V x | y A x = B A

Proof

Step Hyp Ref Expression
1 moeq * x x = B
2 1 a1i y A * x x = B
3 2 abrexdomjm A V x | y A x = B A