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Mirrors > Home > MPE Home > Th. List > necon4bid | Structured version Visualization version Unicode version |
Description: Contrapositive law deduction for inequality. (Contributed by NM, 29-Jun-2007.) |
Ref | Expression |
---|---|
necon4bid.1 |
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Ref | Expression |
---|---|
necon4bid |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | necon4bid.1 |
. . 3
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2 | 1 | necon2bbid 2667 |
. 2
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3 | nne 2628 |
. 2
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4 | 2, 3 | syl6rbb 266 |
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 |
This theorem depends on definitions: df-bi 189 df-ne 2624 |
This theorem is referenced by: nebi 2704 znnenlem 14264 rpexp 14672 norm-i 26782 trlid0b 33744 |
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