Metamath Proof Explorer


Theorem xrneq2d

Description: Equality theorem for the range Cartesian product, deduction form. (Contributed by Peter Mazsa, 7-Sep-2021)

Ref Expression
Hypothesis xrneq2d.1 φ A = B
Assertion xrneq2d φ C A = C B

Proof

Step Hyp Ref Expression
1 xrneq2d.1 φ A = B
2 xrneq2 A = B C A = C B
3 1 2 syl φ C A = C B