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Theorem nfof 6312
Description: Hypothesis builder for function operation. (Contributed by Mario Carneiro, 20-Jul-2014.)
Hypothesis
Ref Expression
nfof.1  |-  F/_ x R
Assertion
Ref Expression
nfof  |-  F/_ x  o F R
Distinct variable group:    x, R

Proof of Theorem nfof
StepHypRef Expression
1 nfcv 2574 1  |-  F/_ x  o F R
Colors of variables: wff set class
Syntax hints:   F/_wnfc 2561    o Fcof 6305
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1556  ax-17 1627
This theorem depends on definitions:  df-bi 179  df-nf 1555  df-nfc 2563
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