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Theorem nfofr 6243
Description: Hypothesis builder for function relation. (Contributed by Mario Carneiro, 28-Jul-2014.)
Ref Expression
nfof.1  |-  F/_ x R
Ref Expression
nfofr  |-  F/_ x  o R R
Distinct variable group:    x, R

Proof of Theorem nfofr
StepHypRef Expression
1 nfcv 2516 1  |-  F/_ x  o R R
Colors of variables: wff set class
Syntax hints:   F/_wnfc 2503    o Rcofr 6236
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-17 1623
This theorem depends on definitions:  df-bi 178  df-nf 1551  df-nfc 2505
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