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| Description: The domain of an intersection belong to the intersection of domains. Theorem 6 of [Suppes] p. 60. |
| Ref | Expression |
|---|---|
| dmin |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 19.40 773 |
. . 3
| |
| 2 | visset 1350 |
. . . . 5
| |
| 3 | 2 | eldm2 2528 |
. . . 4
|
| 4 | elin 1635 |
. . . . 5
| |
| 5 | 4 | biex 733 |
. . . 4
|
| 6 | 3, 5 | bitr 151 |
. . 3
|
| 7 | elin 1635 |
. . . 4
| |
| 8 | 2 | eldm2 2528 |
. . . . 5
|
| 9 | 2 | eldm2 2528 |
. . . . 5
|
| 10 | 8, 9 | anbi12i 369 |
. . . 4
|
| 11 | 7, 10 | bitr 151 |
. . 3
|
| 12 | 1, 6, 11 | 3imtr4 192 |
. 2
|
| 13 | 12 | ssriv 1508 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: rnin 2645 mapdom2lem 3388 |
| 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-16 922 ax-17 925 ax-ext 1074 |
| 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-v 1349 df-un 1490 df-in 1491 df-ss 1492 df-sn 1811 df-pr 1812 df-op 1815 df-br 2063 df-dm 2428 |