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Theorem bj-nfnfc 31426
 Description: Remove dependency on ax-ext 2401 (and df-cleq 2415) from nfnfc 2594. (Contributed by BJ, 6-Oct-2019.) (Proof modification is discouraged.)
Hypothesis
Ref Expression
bj-nfnfc.1
Assertion
Ref Expression
bj-nfnfc

Proof of Theorem bj-nfnfc
Dummy variable is distinct from all other variables.
StepHypRef Expression
1 df-nfc 2573 . 2
2 bj-nfnfc.1 . . . . 5
32bj-nfcri 31425 . . . 4
43nfnf 2006 . . 3
54nfal 2004 . 2
61, 5nfxfr 1693 1
 Colors of variables: wff setvar class Syntax hints:  wal 1436  wnf 1664   wcel 1869  wnfc 2571 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1666  ax-4 1679  ax-5 1749  ax-6 1795  ax-7 1840  ax-10 1888  ax-11 1893  ax-12 1906  ax-13 2054 This theorem depends on definitions:  df-bi 189  df-or 372  df-an 373  df-ex 1661  df-nf 1665  df-sb 1788  df-clel 2418  df-nfc 2573 This theorem is referenced by: (None)
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