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Mirrors > Home > ILE Home > Th. List > csbunig | Unicode version |
Description: Distribute proper substitution through the union of a class. (Contributed by Alan Sare, 10-Nov-2012.) |
Ref | Expression |
---|---|
csbunig |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbabg 2963 | . . 3 | |
2 | sbcexg 2868 | . . . . 5 | |
3 | sbcang 2857 | . . . . . . 7 | |
4 | sbcg 2883 | . . . . . . . 8 | |
5 | sbcel2g 2927 | . . . . . . . 8 | |
6 | 4, 5 | anbi12d 456 | . . . . . . 7 |
7 | 3, 6 | bitrd 186 | . . . . . 6 |
8 | 7 | exbidv 1746 | . . . . 5 |
9 | 2, 8 | bitrd 186 | . . . 4 |
10 | 9 | abbidv 2196 | . . 3 |
11 | 1, 10 | eqtrd 2113 | . 2 |
12 | df-uni 3602 | . . 3 | |
13 | 12 | csbeq2i 2932 | . 2 |
14 | df-uni 3602 | . 2 | |
15 | 11, 13, 14 | 3eqtr4g 2138 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wceq 1284 wex 1421 wcel 1433 cab 2067 wsbc 2815 csb 2908 cuni 3601 |
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-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
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-v 2603 df-sbc 2816 df-csb 2909 df-uni 3602 |
This theorem is referenced by: (None) |
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