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Mirrors > Home > ILE Home > Th. List > difundi | Unicode version |
Description: Distributive law for class difference. Theorem 39 of [Suppes] p. 29. (Contributed by NM, 17-Aug-2004.) |
Ref | Expression |
---|---|
difundi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3125 | . . . 4 | |
2 | eldif 3125 | . . . 4 | |
3 | 1, 2 | anbi12i 456 | . . 3 |
4 | elin 3305 | . . 3 | |
5 | eldif 3125 | . . . . . 6 | |
6 | elun 3263 | . . . . . . . 8 | |
7 | 6 | notbii 658 | . . . . . . 7 |
8 | 7 | anbi2i 453 | . . . . . 6 |
9 | 5, 8 | bitri 183 | . . . . 5 |
10 | ioran 742 | . . . . . 6 | |
11 | 10 | anbi2i 453 | . . . . 5 |
12 | 9, 11 | bitri 183 | . . . 4 |
13 | anandi 580 | . . . 4 | |
14 | 12, 13 | bitri 183 | . . 3 |
15 | 3, 4, 14 | 3bitr4ri 212 | . 2 |
16 | 15 | eqriv 2162 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wa 103 wo 698 wceq 1343 wcel 2136 cdif 3113 cun 3114 cin 3115 |
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-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-ext 2147 |
This theorem depends on definitions: df-bi 116 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-v 2728 df-dif 3118 df-un 3120 df-in 3122 |
This theorem is referenced by: undm 3380 undifdc 6889 uncld 12753 |
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