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Theorem 19.37aiv 1562
Description: Inference from Theorem 19.37 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.)
Hypothesis
Ref Expression
19.37aiv.1 x(φψ)
Assertion
Ref Expression
19.37aiv (φxψ)
Distinct variable group:   φ,x
Allowed substitution hint:   ψ(x)

Proof of Theorem 19.37aiv
StepHypRef Expression
1 19.37aiv.1 . 2 x(φψ)
2 nfv 1418 . . 3 xφ
3219.37-1 1561 . 2 (x(φψ) → (φxψ))
41, 3ax-mp 7 1 (φxψ)
Colors of variables: wff set class
Syntax hints:  wi 4  wex 1378
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1333  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-4 1397  ax-17 1416  ax-ial 1424
This theorem depends on definitions:  df-bi 110  df-nf 1347
This theorem is referenced by:  eqvinc  2661  limom  4279
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