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Mirrors > Home > ILE Home > Th. List > elnn1uz2 | Unicode version |
Description: A positive integer is either 1 or greater than or equal to 2. (Contributed by Paul Chapman, 17-Nov-2012.) |
Ref | Expression |
---|---|
elnn1uz2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | olc 701 | . . . 4 | |
2 | nnz 9186 | . . . . 5 | |
3 | 1z 9193 | . . . . . . . 8 | |
4 | zdceq 9239 | . . . . . . . 8 DECID | |
5 | 3, 4 | mpan2 422 | . . . . . . 7 DECID |
6 | df-dc 821 | . . . . . . 7 DECID | |
7 | 5, 6 | sylib 121 | . . . . . 6 |
8 | df-ne 2328 | . . . . . . 7 | |
9 | 8 | orbi2i 752 | . . . . . 6 |
10 | 7, 9 | sylibr 133 | . . . . 5 |
11 | 2, 10 | syl 14 | . . . 4 |
12 | ordi 806 | . . . 4 | |
13 | 1, 11, 12 | sylanbrc 414 | . . 3 |
14 | eluz2b3 9515 | . . . 4 | |
15 | 14 | orbi2i 752 | . . 3 |
16 | 13, 15 | sylibr 133 | . 2 |
17 | 1nn 8844 | . . . 4 | |
18 | eleq1 2220 | . . . 4 | |
19 | 17, 18 | mpbiri 167 | . . 3 |
20 | eluz2nn 9477 | . . 3 | |
21 | 19, 20 | jaoi 706 | . 2 |
22 | 16, 21 | impbii 125 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wa 103 wb 104 wo 698 DECID wdc 820 wceq 1335 wcel 2128 wne 2327 cfv 5170 c1 7733 cn 8833 c2 8884 cz 9167 cuz 9439 |
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 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-pow 4135 ax-pr 4169 ax-un 4393 ax-setind 4496 ax-cnex 7823 ax-resscn 7824 ax-1cn 7825 ax-1re 7826 ax-icn 7827 ax-addcl 7828 ax-addrcl 7829 ax-mulcl 7830 ax-addcom 7832 ax-addass 7834 ax-distr 7836 ax-i2m1 7837 ax-0lt1 7838 ax-0id 7840 ax-rnegex 7841 ax-cnre 7843 ax-pre-ltirr 7844 ax-pre-ltwlin 7845 ax-pre-lttrn 7846 ax-pre-ltadd 7848 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-reu 2442 df-rab 2444 df-v 2714 df-sbc 2938 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-int 3808 df-br 3966 df-opab 4026 df-mpt 4027 df-id 4253 df-xp 4592 df-rel 4593 df-cnv 4594 df-co 4595 df-dm 4596 df-rn 4597 df-res 4598 df-ima 4599 df-iota 5135 df-fun 5172 df-fn 5173 df-f 5174 df-fv 5178 df-riota 5780 df-ov 5827 df-oprab 5828 df-mpo 5829 df-pnf 7914 df-mnf 7915 df-xr 7916 df-ltxr 7917 df-le 7918 df-sub 8048 df-neg 8049 df-inn 8834 df-2 8892 df-n0 9091 df-z 9168 df-uz 9440 |
This theorem is referenced by: indstr2 9520 prmdc 12006 dfphi2 12094 |
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