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Mirrors > Home > NFE Home > Th. List > olci | Unicode version |
Description: Deduction introducing a disjunct. (Contributed by NM, 19-Jan-2008.) (Proof shortened by Wolf Lammen, 14-Nov-2012.) |
Ref | Expression |
---|---|
orci.1 |
Ref | Expression |
---|---|
olci |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orci.1 | . . 3 | |
2 | 1 | a1i 10 | . 2 |
3 | 2 | orri 365 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wo 357 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 |
This theorem depends on definitions: df-bi 177 df-or 359 |
This theorem is referenced by: falortru 1342 ltcirr 6272 |
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