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Mirrors > Home > ILE Home > Th. List > ssiinf | Unicode version |
Description: Subset theorem for an indexed intersection. (Contributed by FL, 15-Oct-2012.) (Proof shortened by Mario Carneiro, 14-Oct-2016.) |
Ref | Expression |
---|---|
ssiinf.1 |
Ref | Expression |
---|---|
ssiinf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 2684 | . . . . 5 | |
2 | eliin 3813 | . . . . 5 | |
3 | 1, 2 | ax-mp 5 | . . . 4 |
4 | 3 | ralbii 2439 | . . 3 |
5 | ssiinf.1 | . . . 4 | |
6 | nfcv 2279 | . . . 4 | |
7 | 5, 6 | ralcomf 2590 | . . 3 |
8 | 4, 7 | bitri 183 | . 2 |
9 | dfss3 3082 | . 2 | |
10 | dfss3 3082 | . . 3 | |
11 | 10 | ralbii 2439 | . 2 |
12 | 8, 9, 11 | 3bitr4i 211 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wcel 1480 wnfc 2266 wral 2414 cvv 2681 wss 3066 ciin 3809 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-v 2683 df-in 3072 df-ss 3079 df-iin 3811 |
This theorem is referenced by: ssiin 3858 dmiin 4780 |
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