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Mirrors > Home > ILE Home > Th. List > mooran2 | Unicode version |
Description: "At most one" exports disjunction to conjunction. (Contributed by NM, 5-Apr-2004.) (Proof shortened by Andrew Salmon, 9-Jul-2011.) |
Ref | Expression |
---|---|
mooran2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | moor 2012 | . 2 | |
2 | olc 664 | . . 3 | |
3 | 2 | moimi 2006 | . 2 |
4 | 1, 3 | jca 300 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wo 661 wmo 1942 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 |
This theorem depends on definitions: df-bi 115 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 |
This theorem is referenced by: (None) |
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