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Mirrors > Home > ILE Home > Th. List > nfnf1 | Unicode version |
Description: is not free in . (Contributed by Mario Carneiro, 11-Aug-2016.) |
Ref | Expression |
---|---|
nfnf1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nf 1422 | . 2 | |
2 | nfa1 1506 | . 2 | |
3 | 1, 2 | nfxfr 1435 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wal 1314 wnf 1421 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1408 ax-gen 1410 ax-ial 1499 |
This theorem depends on definitions: df-bi 116 df-nf 1422 |
This theorem is referenced by: nfimd 1549 nfnt 1619 nfald 1718 equs5or 1786 sbcomxyyz 1923 nfsb4t 1967 nfnfc1 2261 sbcnestgf 3021 dfnfc2 3724 bdsepnft 13012 setindft 13090 strcollnft 13109 |
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