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Mirrors > Home > ILE Home > Th. List > iunpw | Unicode version |
Description: An indexed union of a power class in terms of the power class of the union of its index. Part of Exercise 24(b) of [Enderton] p. 33. (Contributed by NM, 29-Nov-2003.) |
Ref | Expression |
---|---|
iunpw.1 |
Ref | Expression |
---|---|
iunpw |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseq2 3021 | . . . . . . . 8 | |
2 | 1 | biimprcd 158 | . . . . . . 7 |
3 | 2 | reximdv 2462 | . . . . . 6 |
4 | 3 | com12 30 | . . . . 5 |
5 | ssiun 3720 | . . . . . 6 | |
6 | uniiun 3731 | . . . . . 6 | |
7 | 5, 6 | syl6sseqr 3046 | . . . . 5 |
8 | 4, 7 | impbid1 140 | . . . 4 |
9 | vex 2604 | . . . . 5 | |
10 | 9 | elpw 3388 | . . . 4 |
11 | eliun 3682 | . . . . 5 | |
12 | df-pw 3384 | . . . . . . 7 | |
13 | 12 | abeq2i 2189 | . . . . . 6 |
14 | 13 | rexbii 2373 | . . . . 5 |
15 | 11, 14 | bitri 182 | . . . 4 |
16 | 8, 10, 15 | 3bitr4g 221 | . . 3 |
17 | 16 | eqrdv 2079 | . 2 |
18 | ssid 3018 | . . . . 5 | |
19 | iunpw.1 | . . . . . . . 8 | |
20 | 19 | uniex 4192 | . . . . . . 7 |
21 | 20 | elpw 3388 | . . . . . 6 |
22 | eleq2 2142 | . . . . . 6 | |
23 | 21, 22 | syl5bbr 192 | . . . . 5 |
24 | 18, 23 | mpbii 146 | . . . 4 |
25 | eliun 3682 | . . . 4 | |
26 | 24, 25 | sylib 120 | . . 3 |
27 | elssuni 3629 | . . . . . . 7 | |
28 | elpwi 3391 | . . . . . . 7 | |
29 | 27, 28 | anim12i 331 | . . . . . 6 |
30 | eqss 3014 | . . . . . 6 | |
31 | 29, 30 | sylibr 132 | . . . . 5 |
32 | 31 | ex 113 | . . . 4 |
33 | 32 | reximia 2456 | . . 3 |
34 | 26, 33 | syl 14 | . 2 |
35 | 17, 34 | impbii 124 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 102 wb 103 wceq 1284 wcel 1433 wrex 2349 cvv 2601 wss 2973 cpw 3382 cuni 3601 ciun 3678 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-13 1444 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-un 4188 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-in 2979 df-ss 2986 df-pw 3384 df-uni 3602 df-iun 3680 |
This theorem is referenced by: (None) |
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