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Mirrors > Home > ILE Home > Th. List > sucprc | Unicode version |
Description: A proper class is its own successor. (Contributed by NM, 3-Apr-1995.) |
Ref | Expression |
---|---|
sucprc |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-suc 4301 | . . 3 | |
2 | snprc 3596 | . . . 4 | |
3 | uneq2 3229 | . . . 4 | |
4 | 2, 3 | sylbi 120 | . . 3 |
5 | 1, 4 | syl5eq 2185 | . 2 |
6 | un0 3401 | . 2 | |
7 | 5, 6 | eqtrdi 2189 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wceq 1332 wcel 1481 cvv 2689 cun 3074 c0 3368 csn 3532 csuc 4295 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-v 2691 df-dif 3078 df-un 3080 df-nul 3369 df-sn 3538 df-suc 4301 |
This theorem is referenced by: sucprcreg 4472 sucon 4476 |
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