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| Description: 'Less than' is transitive. Theorem I.17 of [Apostol] p. 20. (Contributed by NM, 14-May-1999.) |
| Ref | Expression |
|---|---|
| lt.1 |
|
| lt.2 |
|
| lt.3 |
|
| Ref | Expression |
|---|---|
| lttri |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lt.1 |
. 2
| |
| 2 | lt.2 |
. 2
| |
| 3 | lt.3 |
. 2
| |
| 4 | lttr 8243 |
. 2
| |
| 5 | 1, 2, 3, 4 | mp3an 1371 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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 8113 ax-resscn 8114 ax-pre-lttrn 8136 |
| 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 8206 df-mnf 8207 df-ltxr 8209 |
| This theorem is referenced by: 1lt3 9305 2lt4 9307 1lt4 9308 3lt5 9310 2lt5 9311 1lt5 9312 4lt6 9314 3lt6 9315 2lt6 9316 1lt6 9317 5lt7 9319 4lt7 9320 3lt7 9321 2lt7 9322 1lt7 9323 6lt8 9325 5lt8 9326 4lt8 9327 3lt8 9328 2lt8 9329 1lt8 9330 7lt9 9332 6lt9 9333 5lt9 9334 4lt9 9335 3lt9 9336 2lt9 9337 1lt9 9338 8lt10 9732 7lt10 9733 6lt10 9734 5lt10 9735 4lt10 9736 3lt10 9737 2lt10 9738 1lt10 9739 sincos2sgn 12317 cos12dec 12319 epos 12332 ene1 12336 eap1 12337 reeff1o 15487 pipos 15502 pigt3 15558 apdiff 16588 |
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