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Mirrors > Home > MPE Home > Th. List > 3imp | Structured version Visualization version Unicode version |
Description: Importation inference. (Contributed by NM, 8-Apr-1994.) |
Ref | Expression |
---|---|
3imp.1 |
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Ref | Expression |
---|---|
3imp |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-3an 1039 |
. 2
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2 | 3imp.1 |
. . 3
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3 | 2 | imp31 448 |
. 2
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4 | 1, 3 | sylbi 207 |
1
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