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Mirrors > Home > MPE Home > Th. List > plttr | Structured version Visualization version GIF version |
Description: The less-than relation is transitive. (psstr 3673 analog.) (Contributed by NM, 2-Dec-2011.) |
Ref | Expression |
---|---|
pltnlt.b | ⊢ 𝐵 = (Base‘𝐾) |
pltnlt.s | ⊢ < = (lt‘𝐾) |
Ref | Expression |
---|---|
plttr | ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋 < 𝑍)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2610 | . . . . . 6 ⊢ (le‘𝐾) = (le‘𝐾) | |
2 | pltnlt.s | . . . . . 6 ⊢ < = (lt‘𝐾) | |
3 | 1, 2 | pltle 16784 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 < 𝑌 → 𝑋(le‘𝐾)𝑌)) |
4 | 3 | 3adant3r3 1268 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 < 𝑌 → 𝑋(le‘𝐾)𝑌)) |
5 | 1, 2 | pltle 16784 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌 < 𝑍 → 𝑌(le‘𝐾)𝑍)) |
6 | 5 | 3adant3r1 1266 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑌 < 𝑍 → 𝑌(le‘𝐾)𝑍)) |
7 | pltnlt.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐾) | |
8 | 7, 1 | postr 16776 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋(le‘𝐾)𝑌 ∧ 𝑌(le‘𝐾)𝑍) → 𝑋(le‘𝐾)𝑍)) |
9 | 4, 6, 8 | syl2and 499 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋(le‘𝐾)𝑍)) |
10 | 7, 2 | pltn2lp 16792 | . . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋)) |
11 | 10 | 3adant3r3 1268 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋)) |
12 | breq2 4587 | . . . . . . 7 ⊢ (𝑋 = 𝑍 → (𝑌 < 𝑋 ↔ 𝑌 < 𝑍)) | |
13 | 12 | anbi2d 736 | . . . . . 6 ⊢ (𝑋 = 𝑍 → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑋) ↔ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
14 | 13 | notbid 307 | . . . . 5 ⊢ (𝑋 = 𝑍 → (¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋) ↔ ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
15 | 11, 14 | syl5ibcom 234 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 = 𝑍 → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
16 | 15 | necon2ad 2797 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋 ≠ 𝑍)) |
17 | 9, 16 | jcad 554 | . 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
18 | 1, 2 | pltval 16783 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋 < 𝑍 ↔ (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
19 | 18 | 3adant3r2 1267 | . 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 < 𝑍 ↔ (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
20 | 17, 19 | sylibrd 248 | 1 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋 < 𝑍)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 class class class wbr 4583 ‘cfv 5804 Basecbs 15695 lecple 15775 Posetcpo 16763 ltcplt 16764 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-iota 5768 df-fun 5806 df-fv 5812 df-preset 16751 df-poset 16769 df-plt 16781 |
This theorem is referenced by: pltletr 16794 plelttr 16795 pospo 16796 archiabllem2c 29080 ofldchr 29145 hlhgt2 33693 hl0lt1N 33694 lhp0lt 34307 |
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