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| Mirrors > Home > MPE Home > Th. List > lelttrdi | Structured version Visualization version GIF version | ||
| Description: If a number is less than another number, and the other number is less than or equal to a third number, the first number is less than the third number. (Contributed by Alexander van der Vekens, 24-Mar-2018.) |
| Ref | Expression |
|---|---|
| lelttrdi.r | ⊢ (𝜑 → (𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ)) |
| lelttrdi.l | ⊢ (𝜑 → 𝐵 ≤ 𝐶) |
| Ref | Expression |
|---|---|
| lelttrdi | ⊢ (𝜑 → (𝐴 < 𝐵 → 𝐴 < 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lelttrdi.r | . . . . 5 ⊢ (𝜑 → (𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ)) | |
| 2 | 1 | simp1d 1160 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 3 | 2 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐴 ∈ ℝ) |
| 4 | 1 | simp2d 1161 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 5 | 4 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐵 ∈ ℝ) |
| 6 | 1 | simp3d 1162 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| 7 | 6 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐶 ∈ ℝ) |
| 8 | simpr 490 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐴 < 𝐵) | |
| 9 | lelttrdi.l | . . . 4 ⊢ (𝜑 → 𝐵 ≤ 𝐶) | |
| 10 | 9 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐵 ≤ 𝐶) |
| 11 | 3, 5, 7, 8, 10 | ltletrd 11395 | . 2 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐴 < 𝐶) |
| 12 | 11 | ex 418 | 1 ⊢ (𝜑 → (𝐴 < 𝐵 → 𝐴 < 𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∧ w3a 1103 ∈ wcel 2145 class class class wbr 5103 ℝcr 11124 < clt 11268 ≤ cle 11269 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-resscn 11182 ax-pre-lttri 11199 ax-pre-lttrn 11200 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-er 8697 df-en 8954 df-dom 8955 df-sdom 8956 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 |
| This theorem is used by: difgtsumgt 12582 subfzo0 13850 eucrctshift 30724 gpgusgralem 48973 |
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