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| Mirrors > Home > MPE Home > Th. List > Mathboxes > mrelatglbALT | Structured version Visualization version GIF version | ||
| Description: Greatest lower bounds in a Moore space are realized by intersections. (Contributed by Stefan O'Rear, 31-Jan-2015.) (Proof shortened by Zhi Wang, 29-Sep-2024.) (Proof modification is discouraged.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| mreclatGOOD.i | ⊢ 𝐼 = (toInc‘𝐶) |
| mrelatglbALT.g | ⊢ 𝐺 = (glb‘𝐼) |
| Ref | Expression |
|---|---|
| mrelatglbALT | ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → (𝐺‘𝑈) = ∩ 𝑈) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mreclatGOOD.i | . 2 ⊢ 𝐼 = (toInc‘𝐶) | |
| 2 | simp1 1136 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → 𝐶 ∈ (Moore‘𝑋)) | |
| 3 | simp2 1137 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → 𝑈 ⊆ 𝐶) | |
| 4 | mrelatglbALT.g | . . 3 ⊢ 𝐺 = (glb‘𝐼) | |
| 5 | 4 | a1i 11 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → 𝐺 = (glb‘𝐼)) |
| 6 | mreintcl 17497 | . . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → ∩ 𝑈 ∈ 𝐶) | |
| 7 | unimax 4894 | . . . 4 ⊢ (∩ 𝑈 ∈ 𝐶 → ∪ {𝑥 ∈ 𝐶 ∣ 𝑥 ⊆ ∩ 𝑈} = ∩ 𝑈) | |
| 8 | 7 | eqcomd 2735 | . . 3 ⊢ (∩ 𝑈 ∈ 𝐶 → ∩ 𝑈 = ∪ {𝑥 ∈ 𝐶 ∣ 𝑥 ⊆ ∩ 𝑈}) |
| 9 | 6, 8 | syl 17 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → ∩ 𝑈 = ∪ {𝑥 ∈ 𝐶 ∣ 𝑥 ⊆ ∩ 𝑈}) |
| 10 | 1, 2, 3, 5, 9, 6 | ipoglb 48975 | 1 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝐶 ∧ 𝑈 ≠ ∅) → (𝐺‘𝑈) = ∩ 𝑈) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 {crab 3394 ⊆ wss 3903 ∅c0 4284 ∪ cuni 4858 ∩ cint 4896 ‘cfv 6482 Moorecmre 17484 glbcglb 18216 toInccipo 18433 |
| 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 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5218 ax-sep 5235 ax-nul 5245 ax-pow 5304 ax-pr 5371 ax-un 7671 ax-cnex 11065 ax-resscn 11066 ax-1cn 11067 ax-icn 11068 ax-addcl 11069 ax-addrcl 11070 ax-mulcl 11071 ax-mulrcl 11072 ax-mulcom 11073 ax-addass 11074 ax-mulass 11075 ax-distr 11076 ax-i2m1 11077 ax-1ne0 11078 ax-1rid 11079 ax-rnegex 11080 ax-rrecex 11081 ax-cnre 11082 ax-pre-lttri 11083 ax-pre-lttrn 11084 ax-pre-ltadd 11085 ax-pre-mulgt0 11086 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3343 df-reu 3344 df-rab 3395 df-v 3438 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4285 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4859 df-int 4897 df-iun 4943 df-br 5093 df-opab 5155 df-mpt 5174 df-tr 5200 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6249 df-ord 6310 df-on 6311 df-lim 6312 df-suc 6313 df-iota 6438 df-fun 6484 df-fn 6485 df-f 6486 df-f1 6487 df-fo 6488 df-f1o 6489 df-fv 6490 df-riota 7306 df-ov 7352 df-oprab 7353 df-mpo 7354 df-om 7800 df-1st 7924 df-2nd 7925 df-frecs 8214 df-wrecs 8245 df-recs 8294 df-rdg 8332 df-1o 8388 df-er 8625 df-en 8873 df-dom 8874 df-sdom 8875 df-fin 8876 df-pnf 11151 df-mnf 11152 df-xr 11153 df-ltxr 11154 df-le 11155 df-sub 11349 df-neg 11350 df-nn 12129 df-2 12191 df-3 12192 df-4 12193 df-5 12194 df-6 12195 df-7 12196 df-8 12197 df-9 12198 df-n0 12385 df-z 12472 df-dec 12592 df-uz 12736 df-fz 13411 df-struct 17058 df-sets 17075 df-slot 17093 df-ndx 17105 df-base 17121 df-tset 17180 df-ple 17181 df-ocomp 17182 df-mre 17488 df-odu 18193 df-proset 18200 df-poset 18219 df-lub 18250 df-glb 18251 df-ipo 18434 |
| This theorem is referenced by: (None) |
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