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| Mirrors > Home > ILE Home > Th. List > nnge1 | Unicode version | ||
| Description: A positive integer is one or greater. (Contributed by NM, 25-Aug-1999.) |
| Ref | Expression |
|---|---|
| nnge1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq2 4135 |
. 2
| |
| 2 | breq2 4135 |
. 2
| |
| 3 | breq2 4135 |
. 2
| |
| 4 | breq2 4135 |
. 2
| |
| 5 | 1le1 8908 |
. 2
| |
| 6 | nnre 9320 |
. . 3
| |
| 7 | recn 8318 |
. . . . . 6
| |
| 8 | 7 | addridd 8482 |
. . . . 5
|
| 9 | 8 | breq2d 4143 |
. . . 4
|
| 10 | 0lt1 8460 |
. . . . . . . 8
| |
| 11 | 0re 8332 |
. . . . . . . . 9
| |
| 12 | 1re 8331 |
. . . . . . . . 9
| |
| 13 | axltadd 8401 |
. . . . . . . . 9
| |
| 14 | 11, 12, 13 | mp3an12 1368 |
. . . . . . . 8
|
| 15 | 10, 14 | mpi 15 |
. . . . . . 7
|
| 16 | readdcl 8311 |
. . . . . . . . 9
| |
| 17 | 11, 16 | mpan2 429 |
. . . . . . . 8
|
| 18 | peano2re 8469 |
. . . . . . . 8
| |
| 19 | lttr 8405 |
. . . . . . . . 9
| |
| 20 | 12, 19 | mp3an3 1367 |
. . . . . . . 8
|
| 21 | 17, 18, 20 | syl2anc 415 |
. . . . . . 7
|
| 22 | 15, 21 | mpand 433 |
. . . . . 6
|
| 23 | 22 | con3d 640 |
. . . . 5
|
| 24 | lenlt 8407 |
. . . . . 6
| |
| 25 | 12, 17, 24 | sylancr 418 |
. . . . 5
|
| 26 | lenlt 8407 |
. . . . . 6
| |
| 27 | 12, 18, 26 | sylancr 418 |
. . . . 5
|
| 28 | 23, 25, 27 | 3imtr4d 203 |
. . . 4
|
| 29 | 9, 28 | sylbird 170 |
. . 3
|
| 30 | 6, 29 | syl 14 |
. 2
|
| 31 | 1, 2, 3, 4, 5, 30 | nnind 9329 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1re 8279 ax-addrcl 8282 ax-0lt1 8291 ax-0id 8293 ax-rnegex 8294 ax-pre-ltirr 8297 ax-pre-lttrn 8299 ax-pre-ltadd 8301 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-xp 4782 df-cnv 4784 df-iota 5340 df-fv 5388 df-ov 6091 df-pnf 8368 df-mnf 8369 df-xr 8370 df-ltxr 8371 df-le 8372 df-inn 9314 |
| This theorem is used by: nnle1eq1 9337 nngt0 9338 nnnlt1 9339 nnrecgt0 9351 nnge1d 9356 elnnnn0c 9619 elnnz1 9678 zltp1le 9710 nn0ledivnn 10185 elfz1b 10514 fzo1fzo0n0 10612 elfzom1elp1fzo 10637 fzo0sn0fzo1 10656 nnlesq 11101 faclbnd 11201 faclbnd3 11203 len0nnbi 11361 fstwrdne0 11366 cvgratz 12324 coprmgcdb 12891 isprm3 12921 pockthg 13165 ballotfilem2 13286 oddennn 13341 chtublem 16295 bposlem1 16311 gausslemma2dlem1a 16382 |
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