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Mirrors > Home > ILE Home > Th. List > nlt1pig | Unicode version |
Description: No positive integer is less than one. (Contributed by Jim Kingdon, 31-Aug-2019.) |
Ref | Expression |
---|---|
nlt1pig |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elni 7249 | . . 3 | |
2 | 1 | simprbi 273 | . 2 |
3 | noel 3413 | . . . . 5 | |
4 | 1pi 7256 | . . . . . . . . 9 | |
5 | ltpiord 7260 | . . . . . . . . 9 | |
6 | 4, 5 | mpan2 422 | . . . . . . . 8 |
7 | df-1o 6384 | . . . . . . . . . 10 | |
8 | 7 | eleq2i 2233 | . . . . . . . . 9 |
9 | elsucg 4382 | . . . . . . . . 9 | |
10 | 8, 9 | syl5bb 191 | . . . . . . . 8 |
11 | 6, 10 | bitrd 187 | . . . . . . 7 |
12 | 11 | biimpa 294 | . . . . . 6 |
13 | 12 | ord 714 | . . . . 5 |
14 | 3, 13 | mpi 15 | . . . 4 |
15 | 14 | ex 114 | . . 3 |
16 | 15 | necon3ad 2378 | . 2 |
17 | 2, 16 | mpd 13 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wb 104 wo 698 wceq 1343 wcel 2136 wne 2336 c0 3409 class class class wbr 3982 csuc 4343 com 4567 c1o 6377 cnpi 7213 clti 7216 |
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-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-v 2728 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-br 3983 df-opab 4044 df-eprel 4267 df-suc 4349 df-iom 4568 df-xp 4610 df-1o 6384 df-ni 7245 df-lti 7248 |
This theorem is referenced by: caucvgsr 7743 |
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