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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 8252 |
. 2
| |
| 5 | 1, 2, 3, 4 | mp3an 1373 |
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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8122 ax-resscn 8123 ax-pre-lttrn 8145 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-pnf 8215 df-mnf 8216 df-ltxr 8218 |
| This theorem is referenced by: 1lt3 9314 2lt4 9316 1lt4 9317 3lt5 9319 2lt5 9320 1lt5 9321 4lt6 9323 3lt6 9324 2lt6 9325 1lt6 9326 5lt7 9328 4lt7 9329 3lt7 9330 2lt7 9331 1lt7 9332 6lt8 9334 5lt8 9335 4lt8 9336 3lt8 9337 2lt8 9338 1lt8 9339 7lt9 9341 6lt9 9342 5lt9 9343 4lt9 9344 3lt9 9345 2lt9 9346 1lt9 9347 8lt10 9741 7lt10 9742 6lt10 9743 5lt10 9744 4lt10 9745 3lt10 9746 2lt10 9747 1lt10 9748 sincos2sgn 12326 cos12dec 12328 epos 12341 ene1 12345 eap1 12346 reeff1o 15496 pipos 15511 pigt3 15567 apdiff 16652 |
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