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Mirrors > Home > MPE Home > Th. List > sylibr | Unicode version |
Description: A mixed syllogism inference from an implication and a biconditional. Useful for substituting a consequent with a definition. (Contributed by NM, 3-Jan-1993.) |
Ref | Expression |
---|---|
sylibr.1 | |
sylibr.2 |
Ref | Expression |
---|---|
sylibr |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylibr.1 | . 2 | |
2 | sylibr.2 | . . 3 | |
3 | 2 | biimpri 206 | . 2 |
4 | 1, 3 | syl 16 | 1 |
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