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Mirrors > Home > MPE Home > Th. List > ifclda | Structured version Visualization version Unicode version |
Description: Conditional closure. (Contributed by Jeff Madsen, 2-Sep-2009.) |
Ref | Expression |
---|---|
ifclda.1 |
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ifclda.2 |
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Ref | Expression |
---|---|
ifclda |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | iftrue 4092 |
. . . 4
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2 | 1 | adantl 482 |
. . 3
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3 | ifclda.1 |
. . 3
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4 | 2, 3 | eqeltrd 2701 |
. 2
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5 | iffalse 4095 |
. . . 4
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6 | 5 | adantl 482 |
. . 3
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7 | ifclda.2 |
. . 3
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8 | 6, 7 | eqeltrd 2701 |
. 2
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9 | 4, 8 | pm2.61dan 832 |
1
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