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Related theorems Unicode version |
| Description: Subset implication for an indexed intersection. |
| Ref | Expression |
|---|---|
| iinss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 19.12 729 |
. . . 4
| |
| 2 | df-rex 1206 |
. . . . 5
| |
| 3 | 19.28v 957 |
. . . . . 6
| |
| 4 | 3 | biex 733 |
. . . . 5
|
| 5 | 2, 4 | bitr4 154 |
. . . 4
|
| 6 | df-rex 1206 |
. . . . 5
| |
| 7 | 6 | bial 695 |
. . . 4
|
| 8 | 1, 5, 7 | 3imtr4 192 |
. . 3
|
| 9 | r19.36av 1299 |
. . . . 5
| |
| 10 | visset 1350 |
. . . . . 6
| |
| 11 | eliin 1999 |
. . . . . 6
| |
| 12 | 10, 11 | ax-mp 6 |
. . . . 5
|
| 13 | 9, 12 | syl5ib 181 |
. . . 4
|
| 14 | 13 | 19.20i 691 |
. . 3
|
| 15 | 8, 14 | syl 12 |
. 2
|
| 16 | dfss2 1497 |
. . 3
| |
| 17 | 16 | birex 1224 |
. 2
|
| 18 | dfss2 1497 |
. 2
| |
| 19 | 15, 17, 18 | 3imtr4 192 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: scott0 3542 |
| 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-ral 1205 df-rex 1206 df-v 1349 df-in 1491 df-ss 1492 df-iin 1997 |