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Theorem nfaba1 2437
Description: Bound-variable hypothesis builder for a class abstraction. (Contributed by Mario Carneiro, 14-Oct-2016.)
Assertion
Ref Expression
nfaba1  |-  F/_ x { y  |  A. x ph }

Proof of Theorem nfaba1
StepHypRef Expression
1 nfa1 1768 . 2  |-  F/ x A. x ph
21nfab 2436 1  |-  F/_ x { y  |  A. x ph }
Colors of variables: wff set class
Syntax hints:   A.wal 1530   {cab 2282   F/_wnfc 2419
This theorem is referenced by:  nfopd  3829  nfimad  5037  nfiota1  5237  nffvd  5550
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1536  ax-5 1547  ax-17 1606  ax-9 1644  ax-8 1661  ax-6 1715  ax-7 1720  ax-11 1727  ax-12 1878
This theorem depends on definitions:  df-bi 177  df-an 360  df-tru 1310  df-ex 1532  df-nf 1535  df-sb 1639  df-clab 2283  df-nfc 2421
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