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Mirrors > Home > NFE Home > Th. List > nf3or | Unicode version |
Description: If ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Ref | Expression |
---|---|
nf.1 |
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nf.2 |
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nf.3 |
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Ref | Expression |
---|---|
nf3or |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-3or 935 |
. 2
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2 | nf.1 |
. . . 4
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3 | nf.2 |
. . . 4
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4 | 2, 3 | nfor 1836 |
. . 3
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5 | nf.3 |
. . 3
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6 | 4, 5 | nfor 1836 |
. 2
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7 | 1, 6 | nfxfr 1570 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-11 1746 |
This theorem depends on definitions: df-bi 177 df-or 359 df-3or 935 df-tru 1319 df-ex 1542 df-nf 1545 |
This theorem is referenced by: (None) |
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