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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 2684 | . . . . 5 | |
2 | 1 | eldm2 4732 | . . . 4 |
3 | 1 | prid1 3624 | . . . . . 6 |
4 | vex 2684 | . . . . . . . . . 10 | |
5 | 1, 4 | uniop 4172 | . . . . . . . . 9 |
6 | 1, 4 | uniopel 4173 | . . . . . . . . 9 |
7 | 5, 6 | eqeltrrid 2225 | . . . . . . . 8 |
8 | elssuni 3759 | . . . . . . . 8 | |
9 | 7, 8 | syl 14 | . . . . . . 7 |
10 | 9 | sseld 3091 | . . . . . 6 |
11 | 3, 10 | mpi 15 | . . . . 5 |
12 | 11 | exlimiv 1577 | . . . 4 |
13 | 2, 12 | sylbi 120 | . . 3 |
14 | 13 | ssriv 3096 | . 2 |
15 | 4 | elrn2 4776 | . . . 4 |
16 | 4 | prid2 3625 | . . . . . 6 |
17 | 9 | sseld 3091 | . . . . . 6 |
18 | 16, 17 | mpi 15 | . . . . 5 |
19 | 18 | exlimiv 1577 | . . . 4 |
20 | 15, 19 | sylbi 120 | . . 3 |
21 | 20 | ssriv 3096 | . 2 |
22 | 14, 21 | unssi 3246 | 1 |
Colors of variables: wff set class |
Syntax hints: wex 1468 wcel 1480 cun 3064 wss 3066 cpr 3523 cop 3525 cuni 3731 cdm 4534 crn 4535 |
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-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-br 3925 df-opab 3985 df-cnv 4542 df-dm 4544 df-rn 4545 |
This theorem is referenced by: dmexg 4798 rnexg 4799 relfld 5062 relcoi2 5064 |
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