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| Description: Law combining indexed union with indexed intersection. (This theorem appears as the last example on http://en.wikipedia.org/wiki/Union%5F%28set%5Ftheory%29. If anyone has a literature reference, please inform N. Megill.) |
| Ref | Expression |
|---|---|
| iuniin |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | r19.12 1740 |
. . 3
| |
| 2 | eliun 2570 |
. . . 4
| |
| 3 | visset 1813 |
. . . . . 6
| |
| 4 | eliin 2571 |
. . . . . 6
| |
| 5 | 3, 4 | ax-mp 7 |
. . . . 5
|
| 6 | 5 | rexbii 1668 |
. . . 4
|
| 7 | 2, 6 | bitr 173 |
. . 3
|
| 8 | eliin 2571 |
. . . . 5
| |
| 9 | 3, 8 | ax-mp 7 |
. . . 4
|
| 10 | eliun 2570 |
. . . . 5
| |
| 11 | 10 | ralbii 1667 |
. . . 4
|
| 12 | 9, 11 | bitr 173 |
. . 3
|
| 13 | 1, 7, 12 | 3imtr4 219 |
. 2
|
| 14 | 13 | ssriv 2069 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-ral 1649 df-rex 1650 df-v 1812 df-in 2051 df-ss 2053 df-iun 2568 df-iin 2569 |