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Mirrors > Home > ILE Home > Th. List > mo2dc | Unicode version |
Description: Alternate definition of "at most one" where existence is decidable. (Contributed by Jim Kingdon, 2-Jul-2018.) |
Ref | Expression |
---|---|
mo2dc.1 |
Ref | Expression |
---|---|
mo2dc | DECID |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mo2dc.1 | . . 3 | |
2 | 1 | modc 1984 | . 2 DECID |
3 | 1 | nfri 1452 | . . 3 |
4 | 3 | mo3h 1994 | . 2 |
5 | 2, 4 | syl6rbbr 197 | 1 DECID |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wb 103 DECID wdc 775 wal 1282 wnf 1389 wex 1421 wsb 1685 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-in1 576 ax-in2 577 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-dc 776 df-tru 1287 df-fal 1290 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 |
This theorem is referenced by: (None) |
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