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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 8363 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 < 𝐵 ∧ 𝐵 < 𝐶) → 𝐴 < 𝐶)) | |
| 5 | 1, 2, 3, 4 | mp3an 1374 | 1 ⊢ ((𝐴 < 𝐵 ∧ 𝐵 < 𝐶) → 𝐴 < 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2205 class class class wbr 4114 ℝcr 8142 < clt 8324 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-cnex 8234 ax-resscn 8235 ax-pre-lttrn 8257 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-br 4115 df-opab 4177 df-xp 4760 df-pnf 8326 df-mnf 8327 df-ltxr 8329 |
| This theorem is referenced by: 1lt3 9429 2lt4 9431 1lt4 9432 3lt5 9434 2lt5 9435 1lt5 9436 4lt6 9438 3lt6 9439 2lt6 9440 1lt6 9441 5lt7 9443 4lt7 9444 3lt7 9445 2lt7 9446 1lt7 9447 6lt8 9449 5lt8 9450 4lt8 9451 3lt8 9452 2lt8 9453 1lt8 9454 7lt9 9456 6lt9 9457 5lt9 9458 4lt9 9459 3lt9 9460 2lt9 9461 1lt9 9462 8lt10 9861 7lt10 9862 6lt10 9863 5lt10 9864 4lt10 9865 3lt10 9866 2lt10 9867 1lt10 9868 sincos2sgn 12480 cos12dec 12482 epos 12495 ene1 12499 eap1 12500 reeff1o 15767 pipos 15782 pigt3 15838 apdiff 16971 |
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