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Theorem nfcxfrd 2487
Description: A utility lemma to transfer a bound-variable hypothesis builder into a definition. (Contributed by Mario Carneiro, 11-Aug-2016.)
Hypotheses
Ref Expression
nfceqi.1
nfcxfrd.2  F/_
Assertion
Ref Expression
nfcxfrd  F/_

Proof of Theorem nfcxfrd
StepHypRef Expression
1 nfcxfrd.2 . 2  F/_
2 nfceqi.1 . . 3
32nfceqi 2485 . 2  F/_  F/_
41, 3sylibr 203 1  F/_
Colors of variables: wff setvar class
Syntax hints:   wi 4   wceq 1642   F/_wnfc 2476
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-11 1746  ax-ext 2334
This theorem depends on definitions:  df-bi 177  df-an 360  df-ex 1542  df-nf 1545  df-cleq 2346  df-clel 2349  df-nfc 2478
This theorem is referenced by:  nfcsb1d  3166  nfcsbd  3169  nfifd  3685  nfunid  3898  nfiotad  4342  nfovd  5544
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