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Mirrors > Home > ILE Home > Th. List > pwin | Unicode version |
Description: The power class of the intersection of two classes is the intersection of their power classes. Exercise 4.12(j) of [Mendelson] p. 235. (Contributed by NM, 23-Nov-2003.) |
Ref | Expression |
---|---|
pwin |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssin 3293 | . . . 4 | |
2 | vex 2684 | . . . . . 6 | |
3 | 2 | elpw 3511 | . . . . 5 |
4 | 2 | elpw 3511 | . . . . 5 |
5 | 3, 4 | anbi12i 455 | . . . 4 |
6 | 2 | elpw 3511 | . . . 4 |
7 | 1, 5, 6 | 3bitr4i 211 | . . 3 |
8 | 7 | ineqri 3264 | . 2 |
9 | 8 | eqcomi 2141 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 103 wceq 1331 wcel 1480 cin 3065 wss 3066 cpw 3505 |
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-v 2683 df-in 3072 df-ss 3079 df-pw 3507 |
This theorem is referenced by: (None) |
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