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| Mirrors > Home > ILE Home > Th. List > lttri | GIF version | ||
| Description: 'Less than' is transitive. Theorem I.17 of [Apostol] p. 20. (Contributed by NM, 14-May-1999.) |
| Ref | Expression |
|---|---|
| lt.1 | ⊢ 𝐴 ∈ ℝ |
| lt.2 | ⊢ 𝐵 ∈ ℝ |
| lt.3 | ⊢ 𝐶 ∈ ℝ |
| Ref | Expression |
|---|---|
| lttri | ⊢ ((𝐴 < 𝐵 ∧ 𝐵 < 𝐶) → 𝐴 < 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lt.1 | . 2 ⊢ 𝐴 ∈ ℝ | |
| 2 | lt.2 | . 2 ⊢ 𝐵 ∈ ℝ | |
| 3 | lt.3 | . 2 ⊢ 𝐶 ∈ ℝ | |
| 4 | lttr 8246 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 < 𝐵 ∧ 𝐵 < 𝐶) → 𝐴 < 𝐶)) | |
| 5 | 1, 2, 3, 4 | mp3an 1371 | 1 ⊢ ((𝐴 < 𝐵 ∧ 𝐵 < 𝐶) → 𝐴 < 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2200 class class class wbr 4086 ℝcr 8024 < clt 8207 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-cnex 8116 ax-resscn 8117 ax-pre-lttrn 8139 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-xp 4729 df-pnf 8209 df-mnf 8210 df-ltxr 8212 |
| This theorem is referenced by: 1lt3 9308 2lt4 9310 1lt4 9311 3lt5 9313 2lt5 9314 1lt5 9315 4lt6 9317 3lt6 9318 2lt6 9319 1lt6 9320 5lt7 9322 4lt7 9323 3lt7 9324 2lt7 9325 1lt7 9326 6lt8 9328 5lt8 9329 4lt8 9330 3lt8 9331 2lt8 9332 1lt8 9333 7lt9 9335 6lt9 9336 5lt9 9337 4lt9 9338 3lt9 9339 2lt9 9340 1lt9 9341 8lt10 9735 7lt10 9736 6lt10 9737 5lt10 9738 4lt10 9739 3lt10 9740 2lt10 9741 1lt10 9742 sincos2sgn 12320 cos12dec 12322 epos 12335 ene1 12339 eap1 12340 reeff1o 15490 pipos 15505 pigt3 15561 apdiff 16602 |
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