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Mirrors > Home > MPE Home > Th. List > con3i | Structured version Visualization version Unicode version |
Description: A contraposition inference. Inference associated with con3 141. Its associated inference is mto 181. (Contributed by NM, 3-Jan-1993.) (Proof shortened by Wolf Lammen, 20-Jun-2013.) |
Ref | Expression |
---|---|
con3i.a |
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Ref | Expression |
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con3i |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 |
. 2
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2 | con3i.a |
. 2
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3 | 1, 2 | nsyl 126 |
1
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