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Related theorems Unicode version |
| Description: The intersection of a
union |
| Ref | Expression |
|---|---|
| ntunte |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluni2 2497 |
. . . . 5
| |
| 2 | 1 | anbi1i 480 |
. . . 4
|
| 3 | elin 2197 |
. . . 4
| |
| 4 | ancom 435 |
. . . . . . . 8
| |
| 5 | r19.41v 1755 |
. . . . . . . 8
| |
| 6 | 4, 5 | bitr4 176 |
. . . . . . 7
|
| 7 | 6 | exbii 1047 |
. . . . . 6
|
| 8 | rexcom4 1815 |
. . . . . 6
| |
| 9 | 7, 8 | bitr4 176 |
. . . . 5
|
| 10 | visset 1804 |
. . . . . . . . 9
| |
| 11 | 10 | inex1 2706 |
. . . . . . . 8
|
| 12 | eleq2 1527 |
. . . . . . . 8
| |
| 13 | 11, 12 | ceqsexv 1826 |
. . . . . . 7
|
| 14 | elin 2197 |
. . . . . . 7
| |
| 15 | 13, 14 | bitr 173 |
. . . . . 6
|
| 16 | 15 | rexbii 1660 |
. . . . 5
|
| 17 | r19.41v 1755 |
. . . . 5
| |
| 18 | 9, 16, 17 | 3bitr 177 |
. . . 4
|
| 19 | 2, 3, 18 | 3bitr4 183 |
. . 3
|
| 20 | eluniab 2503 |
. . 3
| |
| 21 | 19, 20 | bitr4 176 |
. 2
|
| 22 | 21 | eqriv 1467 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: stoi 10483 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-12 965 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-clab 1457 df-cleq 1462 df-clel 1465 df-rex 1642 df-v 1803 df-in 2041 df-uni 2494 |