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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 7116 | . . 3 | |
2 | 1 | simprbi 273 | . 2 |
3 | noel 3367 | . . . . 5 | |
4 | 1pi 7123 | . . . . . . . . 9 | |
5 | ltpiord 7127 | . . . . . . . . 9 | |
6 | 4, 5 | mpan2 421 | . . . . . . . 8 |
7 | df-1o 6313 | . . . . . . . . . 10 | |
8 | 7 | eleq2i 2206 | . . . . . . . . 9 |
9 | elsucg 4326 | . . . . . . . . 9 | |
10 | 8, 9 | syl5bb 191 | . . . . . . . 8 |
11 | 6, 10 | bitrd 187 | . . . . . . 7 |
12 | 11 | biimpa 294 | . . . . . 6 |
13 | 12 | ord 713 | . . . . 5 |
14 | 3, 13 | mpi 15 | . . . 4 |
15 | 14 | ex 114 | . . 3 |
16 | 15 | necon3ad 2350 | . 2 |
17 | 2, 16 | mpd 13 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wb 104 wo 697 wceq 1331 wcel 1480 wne 2308 c0 3363 class class class wbr 3929 csuc 4287 com 4504 c1o 6306 cnpi 7080 clti 7083 |
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 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-ral 2421 df-rex 2422 df-v 2688 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-opab 3990 df-eprel 4211 df-suc 4293 df-iom 4505 df-xp 4545 df-1o 6313 df-ni 7112 df-lti 7115 |
This theorem is referenced by: caucvgsr 7610 |
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