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Theorem nfaba1 2235
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 1480 . 2  |-  F/ x A. x ph
21nfab 2234 1  |-  F/_ x { y  |  A. x ph }
Colors of variables: wff set class
Syntax hints:   A.wal 1288   {cab 2075   F/_wnfc 2216
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 666  ax-5 1382  ax-7 1383  ax-gen 1384  ax-ie1 1428  ax-ie2 1429  ax-8 1441  ax-10 1442  ax-11 1443  ax-i12 1444  ax-bndl 1445  ax-4 1446  ax-17 1465  ax-i9 1469  ax-ial 1473  ax-i5r 1474
This theorem depends on definitions:  df-bi 116  df-nf 1396  df-sb 1694  df-clab 2076  df-nfc 2218
This theorem is referenced by:  nfopd  3647  nfimad  4798  nfiota1  4997  nffvd  5332
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