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Related theorems Unicode version |
| Description: The domain and range of a class are included in its double union. |
| Ref | Expression |
|---|---|
| dmrnssfld |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | visset 2295 |
. . . . 5
| |
| 2 | 1 | eldm2 4154 |
. . . 4
|
| 3 | 1 | prid1 3106 |
. . . . . 6
|
| 4 | uniopel 3556 |
. . . . . . . . 9
| |
| 5 | uniop 3555 |
. . . . . . . . 9
| |
| 6 | 4, 5 | syl5eqelr 1976 |
. . . . . . . 8
|
| 7 | elssuni 3206 |
. . . . . . . 8
| |
| 8 | 6, 7 | syl 12 |
. . . . . . 7
|
| 9 | 8 | sseld 2619 |
. . . . . 6
|
| 10 | 3, 9 | mpi 55 |
. . . . 5
|
| 11 | 10 | 19.23aiv 1674 |
. . . 4
|
| 12 | 2, 11 | sylbi 216 |
. . 3
|
| 13 | 12 | ssriv 2621 |
. 2
|
| 14 | visset 2295 |
. . . . 5
| |
| 15 | 14 | elrn2 4196 |
. . . 4
|
| 16 | 14 | prid2 3107 |
. . . . . 6
|
| 17 | 8 | sseld 2619 |
. . . . . 6
|
| 18 | 16, 17 | mpi 55 |
. . . . 5
|
| 19 | 18 | 19.23aiv 1674 |
. . . 4
|
| 20 | 15, 19 | sylbi 216 |
. . 3
|
| 21 | 20 | ssriv 2621 |
. 2
|
| 22 | 13, 21 | unssi 2781 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: dmexg 4206 rnexg 4207 asymrefOLD 4309 asymref2OLD 4311 relfld 4419 psdmrn 9991 dirdm 10354 ducidu 14358 cmprelid1 14445 tailf 15633 istail 15634 tailmap 15636 filnetlem1 15640 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-rex 2110 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-br 3339 df-opab 3396 df-cnv 4002 df-dm 4004 df-rn 4005 |