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Mirrors > Home > ILE Home > Th. List > lep1 | GIF version |
Description: A number is less than or equal to itself plus 1. (Contributed by NM, 5-Jan-2006.) |
Ref | Expression |
---|---|
lep1 | ⊢ (𝐴 ∈ ℝ → 𝐴 ≤ (𝐴 + 1)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltp1 8796 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 < (𝐴 + 1)) | |
2 | peano2re 8088 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 + 1) ∈ ℝ) | |
3 | ltle 8040 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ (𝐴 + 1) ∈ ℝ) → (𝐴 < (𝐴 + 1) → 𝐴 ≤ (𝐴 + 1))) | |
4 | 2, 3 | mpdan 421 | . 2 ⊢ (𝐴 ∈ ℝ → (𝐴 < (𝐴 + 1) → 𝐴 ≤ (𝐴 + 1))) |
5 | 1, 4 | mpd 13 | 1 ⊢ (𝐴 ∈ ℝ → 𝐴 ≤ (𝐴 + 1)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 2148 class class class wbr 4002 (class class class)co 5871 ℝcr 7806 1c1 7808 + caddc 7810 < clt 7987 ≤ cle 7988 |
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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-sep 4120 ax-pow 4173 ax-pr 4208 ax-un 4432 ax-setind 4535 ax-cnex 7898 ax-resscn 7899 ax-1cn 7900 ax-1re 7901 ax-icn 7902 ax-addcl 7903 ax-addrcl 7904 ax-mulcl 7905 ax-addcom 7907 ax-addass 7909 ax-i2m1 7912 ax-0lt1 7913 ax-0id 7915 ax-rnegex 7916 ax-pre-ltirr 7919 ax-pre-lttrn 7921 ax-pre-ltadd 7923 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-rab 2464 df-v 2739 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-br 4003 df-opab 4064 df-xp 4631 df-cnv 4633 df-iota 5176 df-fv 5222 df-ov 5874 df-pnf 7989 df-mnf 7990 df-xr 7991 df-ltxr 7992 df-le 7993 |
This theorem is referenced by: p1le 8801 lep1d 8883 peano2uz2 9355 |
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