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Mirrors > Home > ILE Home > Th. List > biimprd | Unicode version |
Description: Deduce a converse implication from a logical equivalence. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 22-Sep-2013.) |
Ref | Expression |
---|---|
biimprd.1 |
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Ref | Expression |
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biimprd |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 |
. 2
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2 | biimprd.1 |
. 2
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3 | 1, 2 | imbitrrid 156 |
1
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