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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 7518 |
. . 3
| |
| 2 | 1 | simprbi 275 |
. 2
|
| 3 | noel 3496 |
. . . . 5
| |
| 4 | 1pi 7525 |
. . . . . . . . 9
| |
| 5 | ltpiord 7529 |
. . . . . . . . 9
| |
| 6 | 4, 5 | mpan2 425 |
. . . . . . . 8
|
| 7 | df-1o 6577 |
. . . . . . . . . 10
| |
| 8 | 7 | eleq2i 2296 |
. . . . . . . . 9
|
| 9 | elsucg 4499 |
. . . . . . . . 9
| |
| 10 | 8, 9 | bitrid 192 |
. . . . . . . 8
|
| 11 | 6, 10 | bitrd 188 |
. . . . . . 7
|
| 12 | 11 | biimpa 296 |
. . . . . 6
|
| 13 | 12 | ord 729 |
. . . . 5
|
| 14 | 3, 13 | mpi 15 |
. . . 4
|
| 15 | 14 | ex 115 |
. . 3
|
| 16 | 15 | necon3ad 2442 |
. 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-nul 4213 ax-pow 4262 ax-pr 4297 ax-un 4528 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-br 4087 df-opab 4149 df-eprel 4384 df-suc 4466 df-iom 4687 df-xp 4729 df-1o 6577 df-ni 7514 df-lti 7517 |
| This theorem is referenced by: caucvgsr 8012 |
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