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Mirrors > Home > ILE Home > Th. List > dmrnssfld | Unicode version |
Description: The domain and range of a class are included in its double union. (Contributed by NM, 13-May-2008.) |
Ref | Expression |
---|---|
dmrnssfld |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 2560 | . . . . 5 | |
2 | 1 | eldm2 4533 | . . . 4 |
3 | 1 | prid1 3476 | . . . . . 6 |
4 | vex 2560 | . . . . . . . . . 10 | |
5 | 1, 4 | uniop 3992 | . . . . . . . . 9 |
6 | 1, 4 | uniopel 3993 | . . . . . . . . 9 |
7 | 5, 6 | syl5eqelr 2125 | . . . . . . . 8 |
8 | elssuni 3608 | . . . . . . . 8 | |
9 | 7, 8 | syl 14 | . . . . . . 7 |
10 | 9 | sseld 2944 | . . . . . 6 |
11 | 3, 10 | mpi 15 | . . . . 5 |
12 | 11 | exlimiv 1489 | . . . 4 |
13 | 2, 12 | sylbi 114 | . . 3 |
14 | 13 | ssriv 2949 | . 2 |
15 | 4 | elrn2 4576 | . . . 4 |
16 | 4 | prid2 3477 | . . . . . 6 |
17 | 9 | sseld 2944 | . . . . . 6 |
18 | 16, 17 | mpi 15 | . . . . 5 |
19 | 18 | exlimiv 1489 | . . . 4 |
20 | 15, 19 | sylbi 114 | . . 3 |
21 | 20 | ssriv 2949 | . 2 |
22 | 14, 21 | unssi 3118 | 1 |
Colors of variables: wff set class |
Syntax hints: wex 1381 wcel 1393 cun 2915 wss 2917 cpr 3376 cop 3378 cuni 3580 cdm 4345 crn 4346 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-rex 2312 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-br 3765 df-opab 3819 df-cnv 4353 df-dm 4355 df-rn 4356 |
This theorem is referenced by: dmexg 4596 rnexg 4597 relfld 4846 relcoi2 4848 |
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