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| Mirrors > Home > MPE Home > Th. List > Mathboxes > posjidm | Structured version Visualization version GIF version | ||
| Description: Poset join is idempotent. latjidm 18419 could be shortened by this. (Contributed by Zhi Wang, 27-Sep-2024.) |
| Ref | Expression |
|---|---|
| posjidm.b | β’ π΅ = (BaseβπΎ) |
| posjidm.j | β’ β¨ = (joinβπΎ) |
| Ref | Expression |
|---|---|
| posjidm | β’ ((πΎ β Poset β§ π β π΅) β (π β¨ π) = π) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2730 | . . 3 β’ (lubβπΎ) = (lubβπΎ) | |
| 2 | posjidm.j | . . 3 β’ β¨ = (joinβπΎ) | |
| 3 | simpl 481 | . . 3 β’ ((πΎ β Poset β§ π β π΅) β πΎ β Poset) | |
| 4 | simpr 483 | . . 3 β’ ((πΎ β Poset β§ π β π΅) β π β π΅) | |
| 5 | 1, 2, 3, 4, 4 | joinval 18334 | . 2 β’ ((πΎ β Poset β§ π β π΅) β (π β¨ π) = ((lubβπΎ)β{π, π})) |
| 6 | posjidm.b | . . 3 β’ π΅ = (BaseβπΎ) | |
| 7 | eqid 2730 | . . 3 β’ (leβπΎ) = (leβπΎ) | |
| 8 | 6, 7 | posref 18275 | . . 3 β’ ((πΎ β Poset β§ π β π΅) β π(leβπΎ)π) |
| 9 | eqidd 2731 | . . 3 β’ ((πΎ β Poset β§ π β π΅) β {π, π} = {π, π}) | |
| 10 | 3, 6, 4, 4, 7, 8, 9, 1 | lubpr 47684 | . 2 β’ ((πΎ β Poset β§ π β π΅) β ((lubβπΎ)β{π, π}) = π) |
| 11 | 5, 10 | eqtrd 2770 | 1 β’ ((πΎ β Poset β§ π β π΅) β (π β¨ π) = π) |
| Colors of variables: wff setvar class |
| Syntax hints: β wi 4 β§ wa 394 = wceq 1539 β wcel 2104 {cpr 4629 βcfv 6542 (class class class)co 7411 Basecbs 17148 lecple 17208 Posetcpo 18264 lubclub 18266 joincjn 18268 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 |
| This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-id 5573 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-proset 18252 df-poset 18270 df-lub 18303 df-join 18305 |
| This theorem is referenced by: (None) |
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