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Mirrors > Home > ILE Home > Th. List > indifdir | Unicode version |
Description: Distribute intersection over difference. (Contributed by Scott Fenton, 14-Apr-2011.) |
Ref | Expression |
---|---|
indifdir |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elin 3126 | . . . 4 | |
2 | elin 3126 | . . . . 5 | |
3 | 2 | notbii 594 | . . . 4 |
4 | 1, 3 | anbi12i 433 | . . 3 |
5 | eldif 2927 | . . 3 | |
6 | elin 3126 | . . . . 5 | |
7 | eldif 2927 | . . . . . 6 | |
8 | 7 | anbi1i 431 | . . . . 5 |
9 | 6, 8 | bitri 173 | . . . 4 |
10 | an32 496 | . . . . 5 | |
11 | simpl 102 | . . . . . . . 8 | |
12 | 11 | con3i 562 | . . . . . . 7 |
13 | 12 | anim2i 324 | . . . . . 6 |
14 | simpl 102 | . . . . . . 7 | |
15 | ax-in2 545 | . . . . . . . . . . 11 | |
16 | 15 | expcomd 1330 | . . . . . . . . . 10 |
17 | 16 | impcom 116 | . . . . . . . . 9 |
18 | dfnot 1262 | . . . . . . . . 9 | |
19 | 17, 18 | sylibr 137 | . . . . . . . 8 |
20 | 19 | adantll 445 | . . . . . . 7 |
21 | 14, 20 | jca 290 | . . . . . 6 |
22 | 13, 21 | impbii 117 | . . . . 5 |
23 | 10, 22 | bitri 173 | . . . 4 |
24 | 9, 23 | bitri 173 | . . 3 |
25 | 4, 5, 24 | 3bitr4ri 202 | . 2 |
26 | 25 | eqriv 2037 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 97 wceq 1243 wfal 1248 wcel 1393 cdif 2914 cin 2916 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 |
This theorem depends on definitions: df-bi 110 df-tru 1246 df-fal 1249 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-v 2559 df-dif 2920 df-in 2924 |
This theorem is referenced by: (None) |
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