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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 1148 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 3 | 2 | adantr 481 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐴 ∈ ℝ) |
| 4 | 1 | simp2d 1149 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 5 | 4 | adantr 481 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐵 ∈ ℝ) |
| 6 | 1 | simp3d 1150 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| 7 | 6 | adantr 481 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐶 ∈ ℝ) |
| 8 | simpr 485 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐴 < 𝐵) | |
| 9 | lelttrdi.l | . . . 4 ⊢ (𝜑 → 𝐵 ≤ 𝐶) | |
| 10 | 9 | adantr 481 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐵 ≤ 𝐶) |
| 11 | 3, 5, 7, 8, 10 | ltletrd 11297 | . 2 ⊢ ((𝜑 ∧ 𝐴 < 𝐵) → 𝐴 < 𝐶) |
| 12 | 11 | ex 413 | 1 ⊢ (𝜑 → (𝐴 < 𝐵 → 𝐴 < 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1092 ∈ wcel 2119 class class class wbr 5072 ℝcr 11028 < clt 11170 ≤ cle 11171 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-resscn 11086 ax-pre-lttri 11103 ax-pre-lttrn 11104 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-er 8633 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 |
| This theorem is referenced by: difgtsumgt 12481 subfzo0 13738 eucrctshift 30331 gpgusgralem 48547 |
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