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| Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-peano2 | Unicode version | ||
| Description: Constructive proof of peano2 4631. Temporary note: another possibility is to simply replace sucexg 4534 with bj-sucexg 15568 in the proof of peano2 4631. (Contributed by BJ, 18-Nov-2019.) (Proof modification is discouraged.) | 
| Ref | Expression | 
|---|---|
| bj-peano2 | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | bj-omind 15580 | 
. 2
 | |
| 2 | bj-indsuc 15574 | 
. 2
 | |
| 3 | 1, 2 | ax-mp 5 | 
1
 | 
| Colors of variables: wff set class | 
| Syntax hints:     | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-nul 4159 ax-pr 4242 ax-un 4468 ax-bd0 15459 ax-bdor 15462 ax-bdex 15465 ax-bdeq 15466 ax-bdel 15467 ax-bdsb 15468 ax-bdsep 15530 | 
| This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-dif 3159 df-un 3161 df-nul 3451 df-sn 3628 df-pr 3629 df-uni 3840 df-int 3875 df-suc 4406 df-iom 4627 df-bdc 15487 df-bj-ind 15573 | 
| This theorem is referenced by: bj-nn0suc 15610 bj-nn0sucALT 15624 | 
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