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Theorem nfdv 1754
Description: Apply the definition of not-free in a context. (Contributed by Mario Carneiro, 11-Aug-2016.)
Hypothesis
Ref Expression
nfdv.1
Assertion
Ref Expression
nfdv  F/
Distinct variable group:   ,
Allowed substitution hint:   ()

Proof of Theorem nfdv
StepHypRef Expression
1 nfdv.1 . . 3
21alrimiv 1751 . 2
3 df-nf 1347 . 2  F/
42, 3sylibr 137 1  F/
Colors of variables: wff set class
Syntax hints:   wi 4  wal 1240   F/wnf 1346
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-17 1416
This theorem depends on definitions:  df-bi 110  df-nf 1347
This theorem is referenced by: (None)
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