Theorem cdeqi 3036

Description: Deduce conditional equality. (Contributed by Mario Carneiro, 11-Aug-2016.)

Hypothesis

Ref	Expression
cdeqi.1	|- ( x = y -> ph )

Assertion

Ref	Expression
cdeqi	|- CondEq ( x = y -> ph )

Proof of Theorem cdeqi

Step	Hyp	Ref	Expression
1		cdeqi.1	. 2 |- ( x = y -> ph )
2		df-cdeq 3035	. 2 |- (CondEq ( x = y -> ph ) <-> ( x = y -> ph ) )
3	1, 2	mpbir 146	1 |- CondEq ( x = y -> ph )

This proof depends on syntax axioms:   -> wi 4  CondEqwcdeq 3034

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This proof depends on definitions:  df-bi 117  df-cdeq 3035

This theorem is used by:  cdeqth  3038  cdeqnot  3039  cdeqal  3040  cdeqab  3041  cdeqim  3044  cdeqcv  3045  cdeqeq  3046  cdeqel  3047