| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 8352 | . 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 4111 ℝcr 8131 < clt 8313 |
| 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 4230 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-cnex 8223 ax-resscn 8224 ax-pre-lttrn 8246 |
| 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 3215 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-br 4112 df-opab 4174 df-xp 4757 df-pnf 8315 df-mnf 8316 df-ltxr 8318 |
| This theorem is referenced by: 1lt3 9414 2lt4 9416 1lt4 9417 3lt5 9419 2lt5 9420 1lt5 9421 4lt6 9423 3lt6 9424 2lt6 9425 1lt6 9426 5lt7 9428 4lt7 9429 3lt7 9430 2lt7 9431 1lt7 9432 6lt8 9434 5lt8 9435 4lt8 9436 3lt8 9437 2lt8 9438 1lt8 9439 7lt9 9441 6lt9 9442 5lt9 9443 4lt9 9444 3lt9 9445 2lt9 9446 1lt9 9447 8lt10 9846 7lt10 9847 6lt10 9848 5lt10 9849 4lt10 9850 3lt10 9851 2lt10 9852 1lt10 9853 sincos2sgn 12460 cos12dec 12462 epos 12475 ene1 12479 eap1 12480 reeff1o 15687 pipos 15702 pigt3 15758 apdiff 16881 |
| Copyright terms: Public domain | W3C validator |