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Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-findis | Unicode version |
Description: Principle of induction, using implicit substitutions (the biconditional versions of the hypotheses are implicit substitutions, and we have weakened them to implications). Constructive proof (from CZF). See bj-bdfindis 10742 for a bounded version not requiring ax-setind 4280. See finds 4341 for a proof in IZF. From this version, it is easy to prove of finds 4341, finds2 4342, finds1 4343. (Contributed by BJ, 22-Dec-2019.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
bj-findis.nf0 | |
bj-findis.nf1 | |
bj-findis.nfsuc | |
bj-findis.0 | |
bj-findis.1 | |
bj-findis.suc |
Ref | Expression |
---|---|
bj-findis |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bj-nn0suc 10759 | . . . . 5 | |
2 | pm3.21 260 | . . . . . . . 8 | |
3 | 2 | ad2antrr 471 | . . . . . . 7 |
4 | pm2.04 81 | . . . . . . . . . . 11 | |
5 | 4 | ralimi2 2423 | . . . . . . . . . 10 |
6 | imim2 54 | . . . . . . . . . . . 12 | |
7 | 6 | ral2imi 2427 | . . . . . . . . . . 11 |
8 | 7 | imp 122 | . . . . . . . . . 10 |
9 | 5, 8 | sylan2 280 | . . . . . . . . 9 |
10 | r19.29 2494 | . . . . . . . . . . 11 | |
11 | vex 2604 | . . . . . . . . . . . . . . . 16 | |
12 | 11 | sucid 4172 | . . . . . . . . . . . . . . 15 |
13 | eleq2 2142 | . . . . . . . . . . . . . . 15 | |
14 | 12, 13 | mpbiri 166 | . . . . . . . . . . . . . 14 |
15 | ax-1 5 | . . . . . . . . . . . . . . 15 | |
16 | pm2.27 39 | . . . . . . . . . . . . . . 15 | |
17 | 15, 16 | anim12ii 335 | . . . . . . . . . . . . . 14 |
18 | 14, 17 | mpdan 412 | . . . . . . . . . . . . 13 |
19 | 18 | impcom 123 | . . . . . . . . . . . 12 |
20 | 19 | reximi 2458 | . . . . . . . . . . 11 |
21 | 10, 20 | syl 14 | . . . . . . . . . 10 |
22 | 21 | ex 113 | . . . . . . . . 9 |
23 | 9, 22 | syl 14 | . . . . . . . 8 |
24 | 23 | adantll 459 | . . . . . . 7 |
25 | 3, 24 | orim12d 732 | . . . . . 6 |
26 | 25 | ex 113 | . . . . 5 |
27 | 1, 26 | syl7bi 163 | . . . 4 |
28 | 27 | alrimiv 1795 | . . 3 |
29 | nfv 1461 | . . . . 5 | |
30 | bj-findis.nf1 | . . . . 5 | |
31 | 29, 30 | nfim 1504 | . . . 4 |
32 | nfv 1461 | . . . . 5 | |
33 | nfv 1461 | . . . . . . 7 | |
34 | bj-findis.nf0 | . . . . . . 7 | |
35 | 33, 34 | nfan 1497 | . . . . . 6 |
36 | nfcv 2219 | . . . . . . 7 | |
37 | nfv 1461 | . . . . . . . 8 | |
38 | bj-findis.nfsuc | . . . . . . . 8 | |
39 | 37, 38 | nfan 1497 | . . . . . . 7 |
40 | 36, 39 | nfrexxy 2403 | . . . . . 6 |
41 | 35, 40 | nfor 1506 | . . . . 5 |
42 | 32, 41 | nfim 1504 | . . . 4 |
43 | nfv 1461 | . . . 4 | |
44 | nfv 1461 | . . . 4 | |
45 | eleq1 2141 | . . . . . 6 | |
46 | 45 | biimprd 156 | . . . . 5 |
47 | bj-findis.1 | . . . . 5 | |
48 | 46, 47 | imim12d 73 | . . . 4 |
49 | eleq1 2141 | . . . . . 6 | |
50 | 49 | biimpd 142 | . . . . 5 |
51 | eqtr 2098 | . . . . . . . 8 | |
52 | bj-findis.0 | . . . . . . . 8 | |
53 | 51, 52 | syl 14 | . . . . . . 7 |
54 | 53 | expimpd 355 | . . . . . 6 |
55 | eqtr 2098 | . . . . . . . . 9 | |
56 | bj-findis.suc | . . . . . . . . 9 | |
57 | 55, 56 | syl 14 | . . . . . . . 8 |
58 | 57 | expimpd 355 | . . . . . . 7 |
59 | 58 | rexlimdvw 2480 | . . . . . 6 |
60 | 54, 59 | jaod 669 | . . . . 5 |
61 | 50, 60 | imim12d 73 | . . . 4 |
62 | 31, 42, 43, 44, 48, 61 | setindis 10762 | . . 3 |
63 | 28, 62 | syl 14 | . 2 |
64 | df-ral 2353 | . 2 | |
65 | 63, 64 | sylibr 132 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wo 661 wal 1282 wceq 1284 wnf 1389 wcel 1433 wral 2348 wrex 2349 c0 3251 csuc 4120 com 4331 |
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-13 1444 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-nul 3904 ax-pr 3964 ax-un 4188 ax-setind 4280 ax-bd0 10604 ax-bdim 10605 ax-bdan 10606 ax-bdor 10607 ax-bdn 10608 ax-bdal 10609 ax-bdex 10610 ax-bdeq 10611 ax-bdel 10612 ax-bdsb 10613 ax-bdsep 10675 ax-infvn 10736 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-fal 1290 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-rab 2357 df-v 2603 df-dif 2975 df-un 2977 df-in 2979 df-ss 2986 df-nul 3252 df-sn 3404 df-pr 3405 df-uni 3602 df-int 3637 df-suc 4126 df-iom 4332 df-bdc 10632 df-bj-ind 10722 |
This theorem is referenced by: bj-findisg 10775 bj-findes 10776 |
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