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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ipolub0 | Structured version Visualization version GIF version | ||
| Description: The LUB of the empty set is the intersection of the base. (Contributed by Zhi Wang, 30-Sep-2024.) |
| Ref | Expression |
|---|---|
| ipoglb0.i | ⊢ 𝐼 = (toInc‘𝐹) |
| ipolub0.u | ⊢ (𝜑 → 𝑈 = (lub‘𝐼)) |
| ipolub0.f | ⊢ (𝜑 → ∩ 𝐹 ∈ 𝐹) |
| ipolub0.v | ⊢ (𝜑 → 𝐹 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| ipolub0 | ⊢ (𝜑 → (𝑈‘∅) = ∩ 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ipoglb0.i | . 2 ⊢ 𝐼 = (toInc‘𝐹) | |
| 2 | ipolub0.v | . 2 ⊢ (𝜑 → 𝐹 ∈ 𝑉) | |
| 3 | 0ss 4380 | . . 3 ⊢ ∅ ⊆ 𝐹 | |
| 4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ⊆ 𝐹) |
| 5 | ipolub0.u | . 2 ⊢ (𝜑 → 𝑈 = (lub‘𝐼)) | |
| 6 | uni0 4916 | . . . . . . . 8 ⊢ ∪ ∅ = ∅ | |
| 7 | 0ss 4380 | . . . . . . . 8 ⊢ ∅ ⊆ 𝑥 | |
| 8 | 6, 7 | eqsstri 4010 | . . . . . . 7 ⊢ ∪ ∅ ⊆ 𝑥 |
| 9 | 8 | a1i 11 | . . . . . 6 ⊢ (𝑥 ∈ 𝐹 → ∪ ∅ ⊆ 𝑥) |
| 10 | 9 | rabeqc 3433 | . . . . 5 ⊢ {𝑥 ∈ 𝐹 ∣ ∪ ∅ ⊆ 𝑥} = 𝐹 |
| 11 | 10 | eqcomi 2745 | . . . 4 ⊢ 𝐹 = {𝑥 ∈ 𝐹 ∣ ∪ ∅ ⊆ 𝑥} |
| 12 | 11 | inteqi 4931 | . . 3 ⊢ ∩ 𝐹 = ∩ {𝑥 ∈ 𝐹 ∣ ∪ ∅ ⊆ 𝑥} |
| 13 | 12 | a1i 11 | . 2 ⊢ (𝜑 → ∩ 𝐹 = ∩ {𝑥 ∈ 𝐹 ∣ ∪ ∅ ⊆ 𝑥}) |
| 14 | ipolub0.f | . 2 ⊢ (𝜑 → ∩ 𝐹 ∈ 𝐹) | |
| 15 | 1, 2, 4, 5, 13, 14 | ipolub 48929 | 1 ⊢ (𝜑 → (𝑈‘∅) = ∩ 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 {crab 3420 ⊆ wss 3931 ∅c0 4313 ∪ cuni 4888 ∩ cint 4927 ‘cfv 6536 lubclub 18326 toInccipo 18542 |
| 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 2708 ax-rep 5254 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-cnex 11190 ax-resscn 11191 ax-1cn 11192 ax-icn 11193 ax-addcl 11194 ax-addrcl 11195 ax-mulcl 11196 ax-mulrcl 11197 ax-mulcom 11198 ax-addass 11199 ax-mulass 11200 ax-distr 11201 ax-i2m1 11202 ax-1ne0 11203 ax-1rid 11204 ax-rnegex 11205 ax-rrecex 11206 ax-cnre 11207 ax-pre-lttri 11208 ax-pre-lttrn 11209 ax-pre-ltadd 11210 ax-pre-mulgt0 11211 |
| 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 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-int 4928 df-iun 4974 df-br 5125 df-opab 5187 df-mpt 5207 df-tr 5235 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6295 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7867 df-1st 7993 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-er 8724 df-en 8965 df-dom 8966 df-sdom 8967 df-fin 8968 df-pnf 11276 df-mnf 11277 df-xr 11278 df-ltxr 11279 df-le 11280 df-sub 11473 df-neg 11474 df-nn 12246 df-2 12308 df-3 12309 df-4 12310 df-5 12311 df-6 12312 df-7 12313 df-8 12314 df-9 12315 df-n0 12507 df-z 12594 df-dec 12714 df-uz 12858 df-fz 13530 df-struct 17171 df-slot 17206 df-ndx 17218 df-base 17234 df-tset 17295 df-ple 17296 df-ocomp 17297 df-proset 18311 df-poset 18330 df-lub 18361 df-ipo 18543 |
| This theorem is referenced by: ipolub00 48934 |
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