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Mirrors > Home > MPE Home > Th. List > biimpa | Structured version Visualization version Unicode version |
Description: Importation inference from a logical equivalence. (Contributed by NM, 3-May-1994.) |
Ref | Expression |
---|---|
biimpa.1 |
Ref | Expression |
---|---|
biimpa |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimpa.1 | . . 3 | |
2 | 1 | biimpd 219 | . 2 |
3 | 2 | imp 445 | 1 |
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