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Mirrors > Home > ILE Home > Th. List > nf3 | Unicode version |
Description: An alternate definition of df-nf 1461. (Contributed by Mario Carneiro, 24-Sep-2016.) |
Ref | Expression |
---|---|
nf3 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nf2 1668 |
. 2
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2 | nfe1 1496 |
. . . 4
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3 | 2 | nfri 1519 |
. . 3
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4 | 3 | 19.21h 1557 |
. 2
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5 | 1, 4 | bitr4i 187 |
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-5 1447 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-4 1510 ax-ial 1534 ax-i5r 1535 |
This theorem depends on definitions: df-bi 117 df-nf 1461 |
This theorem is referenced by: hbe1a 2023 eusv2nf 4453 |
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