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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 3995 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 17687 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 < 𝑌 → 𝑋(le‘𝐾)𝑌)) |
4 | 3 | 3adant3r3 1185 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 < 𝑌 → 𝑋(le‘𝐾)𝑌)) |
5 | 1, 2 | pltle 17687 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌 < 𝑍 → 𝑌(le‘𝐾)𝑍)) |
6 | 5 | 3adant3r1 1183 | . . . 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 17679 | . . . 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 611 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋(le‘𝐾)𝑍)) |
10 | 7, 2 | pltn2lp 17695 | . . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋)) |
11 | 10 | 3adant3r3 1185 | . . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋)) |
12 | breq2 5034 | . . . . . . 7 ⊢ (𝑋 = 𝑍 → (𝑌 < 𝑋 ↔ 𝑌 < 𝑍)) | |
13 | 12 | anbi2d 632 | . . . . . 6 ⊢ (𝑋 = 𝑍 → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑋) ↔ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
14 | 13 | notbid 321 | . . . . 5 ⊢ (𝑋 = 𝑍 → (¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑋) ↔ ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
15 | 11, 14 | syl5ibcom 248 | . . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 = 𝑍 → ¬ (𝑋 < 𝑌 ∧ 𝑌 < 𝑍))) |
16 | 15 | necon2ad 2949 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → 𝑋 ≠ 𝑍)) |
17 | 9, 16 | jcad 516 | . 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ 𝑌 < 𝑍) → (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
18 | 1, 2 | pltval 17686 | . . 3 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋 < 𝑍 ↔ (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
19 | 18 | 3adant3r2 1184 | . 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 < 𝑍 ↔ (𝑋(le‘𝐾)𝑍 ∧ 𝑋 ≠ 𝑍))) |
20 | 17, 19 | sylibrd 262 | 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 209 ∧ wa 399 ∧ w3a 1088 = wceq 1542 ∈ wcel 2114 ≠ wne 2934 class class class wbr 5030 ‘cfv 6339 Basecbs 16586 lecple 16675 Posetcpo 17666 ltcplt 17667 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pr 5296 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-ral 3058 df-rex 3059 df-rab 3062 df-v 3400 df-sbc 3681 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-nul 4212 df-if 4415 df-sn 4517 df-pr 4519 df-op 4523 df-uni 4797 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5429 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-iota 6297 df-fun 6341 df-fv 6347 df-proset 17654 df-poset 17672 df-plt 17684 |
This theorem is referenced by: pltletr 17697 plelttr 17698 pospo 17699 archiabllem2c 31026 ofldchr 31090 hlhgt2 37046 hl0lt1N 37047 lhp0lt 37660 |
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