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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ipoglb0 | Structured version Visualization version GIF version | ||
| Description: The GLB of the empty set is the union of the base. (Contributed by Zhi Wang, 30-Sep-2024.) |
| Ref | Expression |
|---|---|
| ipoglb0.i | ⊢ 𝐼 = (toInc‘𝐹) |
| ipoglb0.g | ⊢ (𝜑 → 𝐺 = (glb‘𝐼)) |
| ipoglb0.f | ⊢ (𝜑 → ∪ 𝐹 ∈ 𝐹) |
| Ref | Expression |
|---|---|
| ipoglb0 | ⊢ (𝜑 → (𝐺‘∅) = ∪ 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ipoglb0.i | . 2 ⊢ 𝐼 = (toInc‘𝐹) | |
| 2 | ipoglb0.f | . . 3 ⊢ (𝜑 → ∪ 𝐹 ∈ 𝐹) | |
| 3 | uniexr 7762 | . . 3 ⊢ (∪ 𝐹 ∈ 𝐹 → 𝐹 ∈ V) | |
| 4 | 2, 3 | syl 18 | . 2 ⊢ (𝜑 → 𝐹 ∈ V) |
| 5 | 0ss 4364 | . . 3 ⊢ ∅ ⊆ 𝐹 | |
| 6 | 5 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ⊆ 𝐹) |
| 7 | ipoglb0.g | . 2 ⊢ (𝜑 → 𝐺 = (glb‘𝐼)) | |
| 8 | ssv 3969 | . . . . . . . 8 ⊢ 𝑥 ⊆ V | |
| 9 | int0 4931 | . . . . . . . 8 ⊢ ∩ ∅ = V | |
| 10 | 8, 9 | sseqtrri 3994 | . . . . . . 7 ⊢ 𝑥 ⊆ ∩ ∅ |
| 11 | 10 | a1i 11 | . . . . . 6 ⊢ (𝑥 ∈ 𝐹 → 𝑥 ⊆ ∩ ∅) |
| 12 | 11 | rabeqc 3435 | . . . . 5 ⊢ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅} = 𝐹 |
| 13 | 12 | unieqi 4888 | . . . 4 ⊢ ∪ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅} = ∪ 𝐹 |
| 14 | 13 | eqcomi 2778 | . . 3 ⊢ ∪ 𝐹 = ∪ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅} |
| 15 | 14 | a1i 11 | . 2 ⊢ (𝜑 → ∪ 𝐹 = ∪ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅}) |
| 16 | 1, 4, 6, 7, 15, 2 | ipoglb 49654 | 1 ⊢ (𝜑 → (𝐺‘∅) = ∪ 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 {crab 3423 Vcvv 3463 ⊆ wss 3913 ∅c0 4294 ∪ cuni 4876 ∩ cint 4916 ‘cfv 6537 glbcglb 18366 toInccipo 18583 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11156 ax-resscn 11157 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-addrcl 11161 ax-mulcl 11162 ax-mulrcl 11163 ax-mulcom 11164 ax-addass 11165 ax-mulass 11166 ax-distr 11167 ax-i2m1 11168 ax-1ne0 11169 ax-1rid 11170 ax-rnegex 11171 ax-rrecex 11172 ax-cnre 11173 ax-pre-lttri 11174 ax-pre-lttrn 11175 ax-pre-ltadd 11176 ax-pre-mulgt0 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-1o 8453 df-er 8694 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-pnf 11245 df-mnf 11246 df-xr 11247 df-ltxr 11248 df-le 11249 df-sub 11443 df-neg 11444 df-nn 12234 df-2 12303 df-3 12304 df-4 12305 df-5 12306 df-6 12307 df-7 12308 df-8 12309 df-9 12310 df-n0 12505 df-z 12592 df-dec 12712 df-uz 12863 df-fz 13536 df-struct 17207 df-sets 17224 df-slot 17242 df-ndx 17254 df-base 17270 df-tset 17329 df-ple 17330 df-ocomp 17331 df-odu 18343 df-proset 18350 df-poset 18369 df-lub 18400 df-glb 18401 df-ipo 18584 |
| This theorem is referenced by: toplatglb0 49662 |
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