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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 4035 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 2738 | . . . . . 6 ⊢ (le‘𝐾) = (le‘𝐾) | |
2 | pltnlt.s | . . . . . 6 ⊢ < = (lt‘𝐾) | |
3 | 1, 2 | pltle 17966 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 < 𝑌 → 𝑋(le‘𝐾)𝑌)) |
4 | 3 | 3adant3r3 1182 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 < 𝑌 → 𝑋(le‘𝐾)𝑌)) |
5 | 1, 2 | pltle 17966 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌 < 𝑍 → 𝑌(le‘𝐾)𝑍)) |
6 | 5 | 3adant3r1 1180 | . . . 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 17953 | . . . 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 607 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋(le‘𝐾)𝑍)) |
10 | 7, 2 | pltn2lp 17974 | . . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋)) |
11 | 10 | 3adant3r3 1182 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋)) |
12 | breq2 5074 | . . . . . . 7 ⊢ (𝑋 = 𝑍 → (𝑌 < 𝑋 ↔ 𝑌 < 𝑍)) | |
13 | 12 | anbi2d 628 | . . . . . 6 ⊢ (𝑋 = 𝑍 → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑋) ↔ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
14 | 13 | notbid 317 | . . . . 5 ⊢ (𝑋 = 𝑍 → (¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋) ↔ ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
15 | 11, 14 | syl5ibcom 244 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 = 𝑍 → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
16 | 15 | necon2ad 2957 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋 ≠ 𝑍)) |
17 | 9, 16 | jcad 512 | . 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
18 | 1, 2 | pltval 17965 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋 < 𝑍 ↔ (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
19 | 18 | 3adant3r2 1181 | . 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 < 𝑍 ↔ (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
20 | 17, 19 | sylibrd 258 | 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 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 class class class wbr 5070 ‘cfv 6418 Basecbs 16840 lecple 16895 Posetcpo 17940 ltcplt 17941 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-sbc 3712 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-iota 6376 df-fun 6420 df-fv 6426 df-proset 17928 df-poset 17946 df-plt 17963 |
This theorem is referenced by: pltletr 17976 plelttr 17977 pospo 17978 archiabllem2c 31351 ofldchr 31415 hlhgt2 37330 hl0lt1N 37331 lhp0lt 37944 |
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