| Mathbox for Zhi Wang |
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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 7764 | . . 3 ⊢ (∪ 𝐹 ∈ 𝐹 → 𝐹 ∈ V) | |
| 4 | 2, 3 | syl 18 | . 2 ⊢ (𝜑 → 𝐹 ∈ V) |
| 5 | 0ss 4360 | . . 3 ⊢ ∅ ⊆ 𝐹 | |
| 6 | 5 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ⊆ 𝐹) |
| 7 | ipoglb0.g | . 2 ⊢ (𝜑 → 𝐺 = (glb‘𝐼)) | |
| 8 | ssv 3964 | . . . . . . . 8 ⊢ 𝑥 ⊆ V | |
| 9 | int0 4930 | . . . . . . . 8 ⊢ ∩ ∅ = V | |
| 10 | 8, 9 | sseqtrri 3989 | . . . . . . 7 ⊢ 𝑥 ⊆ ∩ ∅ |
| 11 | 10 | a1i 11 | . . . . . 6 ⊢ (𝑥 ∈ 𝐹 → 𝑥 ⊆ ∩ ∅) |
| 12 | 11 | rabeqc 3431 | . . . . 5 ⊢ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅} = 𝐹 |
| 13 | 12 | unieqi 4887 | . . . 4 ⊢ ∪ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅} = ∪ 𝐹 |
| 14 | 13 | eqcomi 2775 | . . 3 ⊢ ∪ 𝐹 = ∪ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅} |
| 15 | 14 | a1i 11 | . 2 ⊢ (𝜑 → ∪ 𝐹 = ∪ {𝑥 ∈ 𝐹 ∣ 𝑥 ⊆ ∩ ∅}) |
| 16 | 1, 4, 6, 7, 15, 2 | ipoglb 49801 | 1 ⊢ (𝜑 → (𝐺‘∅) = ∪ 𝐹) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 {crab 3419 Vcvv 3458 ⊆ wss 3908 ∅c0 4289 ∪ cuni 4875 ∩ cint 4915 ‘cfv 6540 glbcglb 18376 toInccipo 18593 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5241 ax-sep 5260 ax-nul 5272 ax-pow 5339 ax-pr 5407 ax-un 7738 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4491 df-pw 4567 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4876 df-int 4916 df-iun 4961 df-br 5113 df-opab 5177 df-mpt 5196 df-tr 5222 df-id 5559 df-eprel 5564 df-po 5572 df-so 5573 df-fr 5617 df-we 5619 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7865 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11453 df-neg 11454 df-nn 12244 df-2 12313 df-3 12314 df-4 12315 df-5 12316 df-6 12317 df-7 12318 df-8 12319 df-9 12320 df-n0 12515 df-z 12602 df-dec 12722 df-uz 12873 df-fz 13546 df-struct 17217 df-sets 17234 df-slot 17252 df-ndx 17264 df-base 17280 df-tset 17339 df-ple 17340 df-ocomp 17341 df-odu 18353 df-proset 18360 df-poset 18379 df-lub 18410 df-glb 18411 df-ipo 18594 |
| This theorem is used by: toplatglb0 49809 |
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