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Theorem nfaba1 2919
 Description: Bound-variable hypothesis builder for a class abstraction. (Contributed by Mario Carneiro, 14-Oct-2016.)
Assertion
Ref Expression
nfaba1 𝑥{𝑦 ∣ ∀𝑥𝜑}

Proof of Theorem nfaba1
StepHypRef Expression
1 nfa1 2184 . 2 𝑥𝑥𝜑
21nfab 2918 1 𝑥{𝑦 ∣ ∀𝑥𝜑}
 Colors of variables: wff setvar class Syntax hints:  ∀wal 1629  {cab 2757  Ⅎwnfc 2900 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408 This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-clab 2758  df-nfc 2902 This theorem is referenced by:  nfopd  4556  nfimad  5616  nfiota1  5996  nffvd  6341  nfunidALT2  34778  nfunidALT  34779  nfopdALT  34780  setrec1  42966
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