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Mirrors > Home > MPE Home > Th. List > mpbii | Structured version Visualization version Unicode version |
Description: An inference from a nested biconditional, related to modus ponens. (Contributed by NM, 16-May-1993.) (Proof shortened by Wolf Lammen, 25-Oct-2012.) |
Ref | Expression |
---|---|
mpbii.min |
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mpbii.maj |
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Ref | Expression |
---|---|
mpbii |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpbii.min |
. . 3
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2 | 1 | a1i 11 |
. 2
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3 | mpbii.maj |
. 2
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4 | 2, 3 | mpbid 222 |
1
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