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| Mirrors > Home > MPE Home > Th. List > Mathboxes > glbprdm | Structured version Visualization version GIF version | ||
| Description: The set of two comparable elements in a poset has GLB. (Contributed by Zhi Wang, 26-Sep-2024.) |
| Ref | Expression |
|---|---|
| lubpr.k | ⊢ (𝜑 → 𝐾 ∈ Poset) |
| lubpr.b | ⊢ 𝐵 = (Base‘𝐾) |
| lubpr.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| lubpr.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| lubpr.l | ⊢ ≤ = (le‘𝐾) |
| lubpr.c | ⊢ (𝜑 → 𝑋 ≤ 𝑌) |
| lubpr.s | ⊢ (𝜑 → 𝑆 = {𝑋, 𝑌}) |
| glbpr.g | ⊢ 𝐺 = (glb‘𝐾) |
| Ref | Expression |
|---|---|
| glbprdm | ⊢ (𝜑 → 𝑆 ∈ dom 𝐺) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lubpr.k | . . 3 ⊢ (𝜑 → 𝐾 ∈ Poset) | |
| 2 | lubpr.b | . . 3 ⊢ 𝐵 = (Base‘𝐾) | |
| 3 | lubpr.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 4 | lubpr.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 5 | lubpr.l | . . 3 ⊢ ≤ = (le‘𝐾) | |
| 6 | lubpr.c | . . 3 ⊢ (𝜑 → 𝑋 ≤ 𝑌) | |
| 7 | lubpr.s | . . 3 ⊢ (𝜑 → 𝑆 = {𝑋, 𝑌}) | |
| 8 | glbpr.g | . . 3 ⊢ 𝐺 = (glb‘𝐾) | |
| 9 | 1, 2, 3, 4, 5, 6, 7, 8 | glbprlem 49092 | . 2 ⊢ (𝜑 → (𝑆 ∈ dom 𝐺 ∧ (𝐺‘𝑆) = 𝑋)) |
| 10 | 9 | simpld 494 | 1 ⊢ (𝜑 → 𝑆 ∈ dom 𝐺) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 {cpr 4579 class class class wbr 5095 dom cdm 5621 ‘cfv 6488 Basecbs 17124 lecple 17172 Posetcpo 18217 glbcglb 18220 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-cnex 11071 ax-resscn 11072 ax-1cn 11073 ax-icn 11074 ax-addcl 11075 ax-addrcl 11076 ax-mulcl 11077 ax-mulrcl 11078 ax-mulcom 11079 ax-addass 11080 ax-mulass 11081 ax-distr 11082 ax-i2m1 11083 ax-1ne0 11084 ax-1rid 11085 ax-rnegex 11086 ax-rrecex 11087 ax-cnre 11088 ax-pre-lttri 11089 ax-pre-lttrn 11090 ax-pre-ltadd 11091 ax-pre-mulgt0 11092 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-om 7805 df-2nd 7930 df-frecs 8219 df-wrecs 8250 df-recs 8299 df-rdg 8337 df-er 8630 df-en 8878 df-dom 8879 df-sdom 8880 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-sub 11355 df-neg 11356 df-nn 12135 df-2 12197 df-3 12198 df-4 12199 df-5 12200 df-6 12201 df-7 12202 df-8 12203 df-9 12204 df-dec 12597 df-sets 17079 df-slot 17097 df-ndx 17109 df-base 17125 df-ple 17185 df-odu 18197 df-proset 18204 df-poset 18223 df-lub 18254 df-glb 18255 |
| This theorem is referenced by: toslat 49109 |
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