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Mirrors > Home > ILE Home > Th. List > nfth | Unicode version |
Description: No variable is (effectively) free in a theorem. (Contributed by Mario Carneiro, 11-Aug-2016.) |
Ref | Expression |
---|---|
hbth.1 |
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Ref | Expression |
---|---|
nfth |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hbth.1 |
. . 3
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2 | 1 | hbth 1463 |
. 2
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3 | 2 | nfi 1462 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-gen 1449 |
This theorem depends on definitions: df-bi 117 df-nf 1461 |
This theorem is referenced by: nftru 1466 nfequid 1702 sbt 1784 sbc2ie 3035 omsinds 4622 |
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