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Theorem nfdh 1767
Description: Deduce that is not free in in a context. (Contributed by Mario Carneiro, 24-Sep-2016.)
Hypotheses
Ref Expression
nfdh.1
nfdh.2
Assertion
Ref Expression
nfdh  F/

Proof of Theorem nfdh
StepHypRef Expression
1 nfdh.1 . . 3
21nfi 1551 . 2  F/
3 nfdh.2 . 2
42, 3nfd 1766 1  F/
Colors of variables: wff setvar class
Syntax hints:   wi 4  wal 1540   F/wnf 1544
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-11 1746
This theorem depends on definitions:  df-bi 177  df-ex 1542  df-nf 1545
This theorem is referenced by:  hbimd  1815  ax11indalem  2197  ax11inda2ALT  2198
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