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| Mirrors > Home > ILE Home > Th. List > lep1 | Unicode version | ||
| Description: A number is less than or equal to itself plus 1. (Contributed by NM, 5-Jan-2006.) |
| Ref | Expression |
|---|---|
| lep1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltp1 8873 |
. 2
| |
| 2 | peano2re 8164 |
. . 3
| |
| 3 | ltle 8116 |
. . 3
| |
| 4 | 2, 3 | mpdan 421 |
. 2
|
| 5 | 1, 4 | 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7972 ax-resscn 7973 ax-1cn 7974 ax-1re 7975 ax-icn 7976 ax-addcl 7977 ax-addrcl 7978 ax-mulcl 7979 ax-addcom 7981 ax-addass 7983 ax-i2m1 7986 ax-0lt1 7987 ax-0id 7989 ax-rnegex 7990 ax-pre-ltirr 7993 ax-pre-lttrn 7995 ax-pre-ltadd 7997 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-xp 4670 df-cnv 4672 df-iota 5220 df-fv 5267 df-ov 5926 df-pnf 8065 df-mnf 8066 df-xr 8067 df-ltxr 8068 df-le 8069 |
| This theorem is referenced by: p1le 8878 lep1d 8960 peano2uz2 9435 |
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