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Mirrors > Home > ILE Home > Th. List > difindiss | Unicode version |
Description: Distributive law for class difference. In classical logic, for example, theorem 40 of [Suppes] p. 29, this is an equality instead of subset. (Contributed by Jim Kingdon, 26-Jul-2018.) |
Ref | Expression |
---|---|
difindiss |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elun 3113 | . . 3 | |
2 | eldif 2982 | . . . . . . 7 | |
3 | eldif 2982 | . . . . . . 7 | |
4 | 2, 3 | orbi12i 713 | . . . . . 6 |
5 | andi 764 | . . . . . 6 | |
6 | 4, 5 | bitr4i 185 | . . . . 5 |
7 | pm3.14 702 | . . . . . 6 | |
8 | 7 | anim2i 334 | . . . . 5 |
9 | 6, 8 | sylbi 119 | . . . 4 |
10 | eldif 2982 | . . . . 5 | |
11 | elin 3155 | . . . . . . 7 | |
12 | 11 | notbii 626 | . . . . . 6 |
13 | 12 | anbi2i 444 | . . . . 5 |
14 | 10, 13 | bitr2i 183 | . . . 4 |
15 | 9, 14 | sylib 120 | . . 3 |
16 | 1, 15 | sylbi 119 | . 2 |
17 | 16 | ssriv 3003 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wa 102 wo 661 wcel 1433 cdif 2970 cun 2971 cin 2972 wss 2973 |
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-in1 576 ax-in2 577 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-dif 2975 df-un 2977 df-in 2979 df-ss 2986 |
This theorem is referenced by: difdif2ss 3221 indmss 3223 |
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