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Mirrors > Home > NFE Home > Th. List > bitr4i | Unicode version |
Description: An inference from transitive law for logical equivalence. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
bitr4i.1 |
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bitr4i.2 |
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Ref | Expression |
---|---|
bitr4i |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bitr4i.1 |
. 2
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2 | bitr4i.2 |
. . 3
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3 | 2 | bicomi 193 |
. 2
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4 | 1, 3 | bitri 240 |
1
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