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| Mirrors > Home > MPE Home > Th. List > letrp1 | Structured version Visualization version GIF version | ||
| Description: A transitive property of 'less than or equal' and plus 1. (Contributed by NM, 5-Aug-2005.) |
| Ref | Expression |
|---|---|
| letrp1 | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ≤ 𝐵) → 𝐴 ≤ (𝐵 + 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltp1 12086 | . . . . 5 ⊢ (𝐵 ∈ ℝ → 𝐵 < (𝐵 + 1)) | |
| 2 | 1 | adantl 481 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → 𝐵 < (𝐵 + 1)) |
| 3 | peano2re 11413 | . . . . . 6 ⊢ (𝐵 ∈ ℝ → (𝐵 + 1) ∈ ℝ) | |
| 4 | 3 | ancli 548 | . . . . 5 ⊢ (𝐵 ∈ ℝ → (𝐵 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ)) |
| 5 | lelttr 11330 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ) → ((𝐴 ≤ 𝐵 ∧ 𝐵 < (𝐵 + 1)) → 𝐴 < (𝐵 + 1))) | |
| 6 | 5 | 3expb 1120 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ)) → ((𝐴 ≤ 𝐵 ∧ 𝐵 < (𝐵 + 1)) → 𝐴 < (𝐵 + 1))) |
| 7 | 4, 6 | sylan2 593 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 ≤ 𝐵 ∧ 𝐵 < (𝐵 + 1)) → 𝐴 < (𝐵 + 1))) |
| 8 | 2, 7 | mpan2d 694 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → 𝐴 < (𝐵 + 1))) |
| 9 | 8 | 3impia 1117 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ≤ 𝐵) → 𝐴 < (𝐵 + 1)) |
| 10 | ltle 11328 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ) → (𝐴 < (𝐵 + 1) → 𝐴 ≤ (𝐵 + 1))) | |
| 11 | 3, 10 | sylan2 593 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < (𝐵 + 1) → 𝐴 ≤ (𝐵 + 1))) |
| 12 | 11 | 3adant3 1132 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ≤ 𝐵) → (𝐴 < (𝐵 + 1) → 𝐴 ≤ (𝐵 + 1))) |
| 13 | 9, 12 | mpd 15 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐴 ≤ 𝐵) → 𝐴 ≤ (𝐵 + 1)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 ∈ wcel 2109 class class class wbr 5124 (class class class)co 7410 ℝcr 11133 1c1 11135 + caddc 11137 < clt 11274 ≤ cle 11275 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-resscn 11191 ax-1cn 11192 ax-icn 11193 ax-addcl 11194 ax-addrcl 11195 ax-mulcl 11196 ax-mulrcl 11197 ax-mulcom 11198 ax-addass 11199 ax-mulass 11200 ax-distr 11201 ax-i2m1 11202 ax-1ne0 11203 ax-1rid 11204 ax-rnegex 11205 ax-rrecex 11206 ax-cnre 11207 ax-pre-lttri 11208 ax-pre-lttrn 11209 ax-pre-ltadd 11210 ax-pre-mulgt0 11211 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-br 5125 df-opab 5187 df-mpt 5207 df-id 5553 df-po 5566 df-so 5567 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-er 8724 df-en 8965 df-dom 8966 df-sdom 8967 df-pnf 11276 df-mnf 11277 df-xr 11278 df-ltxr 11279 df-le 11280 df-sub 11473 df-neg 11474 |
| This theorem is referenced by: peano2uz 12922 clwwlkinwwlk 30026 jm2.27dlem2 43001 stoweidlem20 46016 |
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