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| Description: The converse of a class union is the (indexed) union of the converses of its members. |
| Ref | Expression |
|---|---|
| cnvuni |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elcnv2 2515 |
. . . 4
| |
| 2 | eluni2 1923 |
. . . . . . 7
| |
| 3 | 2 | anbi2i 367 |
. . . . . 6
|
| 4 | r19.42v 1303 |
. . . . . 6
| |
| 5 | 3, 4 | bitr4 154 |
. . . . 5
|
| 6 | 5 | bi2ex 734 |
. . . 4
|
| 7 | rexcom4 1361 |
. . . . . 6
| |
| 8 | rexcom4 1361 |
. . . . . . 7
| |
| 9 | 8 | biex 733 |
. . . . . 6
|
| 10 | 7, 9 | bitr2 152 |
. . . . 5
|
| 11 | elcnv2 2515 |
. . . . . 6
| |
| 12 | 11 | birex 1224 |
. . . . 5
|
| 13 | 10, 12 | bitr4 154 |
. . . 4
|
| 14 | 1, 6, 13 | 3bitr 155 |
. . 3
|
| 15 | eliun 1998 |
. . 3
| |
| 16 | 14, 15 | bitr4 154 |
. 2
|
| 17 | 16 | cleqri 1101 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: funcnvuni 2706 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-iun 1996 df-br 2063 df-opab 2098 df-cnv 2426 |