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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 7527 |
. . 3
| |
| 2 | 1 | simprbi 275 |
. 2
|
| 3 | noel 3498 |
. . . . 5
| |
| 4 | 1pi 7534 |
. . . . . . . . 9
| |
| 5 | ltpiord 7538 |
. . . . . . . . 9
| |
| 6 | 4, 5 | mpan2 425 |
. . . . . . . 8
|
| 7 | df-1o 6581 |
. . . . . . . . . 10
| |
| 8 | 7 | eleq2i 2298 |
. . . . . . . . 9
|
| 9 | elsucg 4501 |
. . . . . . . . 9
| |
| 10 | 8, 9 | bitrid 192 |
. . . . . . . 8
|
| 11 | 6, 10 | bitrd 188 |
. . . . . . 7
|
| 12 | 11 | biimpa 296 |
. . . . . 6
|
| 13 | 12 | ord 731 |
. . . . 5
|
| 14 | 3, 13 | mpi 15 |
. . . 4
|
| 15 | 14 | ex 115 |
. . 3
|
| 16 | 15 | necon3ad 2444 |
. 2
|
| 17 | 2, 16 | mpd 13 |
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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-eprel 4386 df-suc 4468 df-iom 4689 df-xp 4731 df-1o 6581 df-ni 7523 df-lti 7526 |
| This theorem is referenced by: caucvgsr 8021 |
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