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Mirrors > Home > MPE Home > Th. List > dfifp3 | Structured version Visualization version Unicode version |
Description: Alternate definition of the conditional operator for propositions. (Contributed by BJ, 30-Sep-2019.) |
Ref | Expression |
---|---|
dfifp3 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfifp2 1426 |
. 2
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2 | pm4.64 374 |
. . 3
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3 | 2 | anbi2i 699 |
. 2
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4 | 1, 3 | bitri 253 |
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-or 372 df-an 373 df-ifp 1425 |
This theorem is referenced by: dfifp4 1428 ifptru 1435 |
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