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Theorem nfaba1 2494
Description: Bound-variable hypothesis builder for a class abstraction. (Contributed by Mario Carneiro, 14-Oct-2016.)
Assertion
Ref Expression
nfaba1  F/_

Proof of Theorem nfaba1
StepHypRef Expression
1 nfa1 1788 . 2  F/
21nfab 2493 1  F/_
Colors of variables: wff setvar class
Syntax hints:  wal 1540  cab 2339   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-6 1729  ax-7 1734  ax-11 1746  ax-12 1925
This theorem depends on definitions:  df-bi 177  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-nfc 2478
This theorem is referenced by:  nfiota1  4341  nfopd  4605  nfimad  4954  nffvd  5335
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