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Mirrors > Home > ILE Home > Th. List > mpbiri | Unicode version |
Description: An inference from a nested biconditional, related to modus ponens. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 25-Oct-2012.) |
Ref | Expression |
---|---|
mpbiri.min | |
mpbiri.maj |
Ref | Expression |
---|---|
mpbiri |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpbiri.min | . . 3 | |
2 | 1 | a1i 9 | . 2 |
3 | mpbiri.maj | . 2 | |
4 | 2, 3 | mpbird 166 | 1 |
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