Theorem cdeqri 3757

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

Hypothesis

Ref	Expression
cdeqri.1	⊢ CondEq(𝑥 = 𝑦 → 𝜑)

Assertion

Ref	Expression
cdeqri	⊢ (𝑥 = 𝑦 → 𝜑)

Proof of Theorem cdeqri

Step	Hyp	Ref	Expression
1		cdeqri.1	. 2 ⊢ CondEq(𝑥 = 𝑦 → 𝜑)
2		df-cdeq 3755	. 2 ⊢ (CondEq(𝑥 = 𝑦 → 𝜑) ↔ (𝑥 = 𝑦 → 𝜑))
3	1, 2	mpbi 232	1 ⊢ (𝑥 = 𝑦 → 𝜑)

Syntax hints:   → wi 4  CondEqwcdeq 3754

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 209  df-cdeq 3755

This theorem is referenced by:  cdeqnot  3759  cdeqal  3760  cdeqab  3761  cdeqal1  3762  cdeqab1  3763  cdeqim  3764  cdeqeq  3766  cdeqel  3767  nfcdeq  3768