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Mirrors > Home > NFE Home > Th. List > nfndOLD | Unicode version |
Description: Obsolete proof of nfnd 1791 as of 28-Dec-2017. (Contributed by Mario Carneiro, 24-Sep-2016.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nfnd.1 |
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Ref | Expression |
---|---|
nfndOLD |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfnd.1 |
. 2
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2 | nfnf1 1790 |
. . 3
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3 | ax6o 1750 |
. . . . 5
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4 | 3 | con1i 121 |
. . . 4
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5 | df-nf 1545 |
. . . . 5
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6 | con3 126 |
. . . . . 6
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7 | 6 | al2imi 1561 |
. . . . 5
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8 | 5, 7 | sylbi 187 |
. . . 4
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9 | 4, 8 | syl5 28 |
. . 3
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10 | 2, 9 | nfd 1766 |
. 2
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11 | 1, 10 | syl 15 |
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-ex 1542 df-nf 1545 |
This theorem is referenced by: (None) |
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