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Mirrors > Home > MPE Home > Th. List > metnrmlem2 | Structured version Visualization version GIF version |
Description: Lemma for metnrm 23759. (Contributed by Mario Carneiro, 14-Jan-2014.) (Revised by Mario Carneiro, 5-Sep-2015.) |
Ref | Expression |
---|---|
metdscn.f | ⊢ 𝐹 = (𝑥 ∈ 𝑋 ↦ inf(ran (𝑦 ∈ 𝑆 ↦ (𝑥𝐷𝑦)), ℝ*, < )) |
metdscn.j | ⊢ 𝐽 = (MetOpen‘𝐷) |
metnrmlem.1 | ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋)) |
metnrmlem.2 | ⊢ (𝜑 → 𝑆 ∈ (Clsd‘𝐽)) |
metnrmlem.3 | ⊢ (𝜑 → 𝑇 ∈ (Clsd‘𝐽)) |
metnrmlem.4 | ⊢ (𝜑 → (𝑆 ∩ 𝑇) = ∅) |
metnrmlem.u | ⊢ 𝑈 = ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) |
Ref | Expression |
---|---|
metnrmlem2 | ⊢ (𝜑 → (𝑈 ∈ 𝐽 ∧ 𝑇 ⊆ 𝑈)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | metnrmlem.u | . . 3 ⊢ 𝑈 = ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) | |
2 | metnrmlem.1 | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋)) | |
3 | metdscn.j | . . . . . 6 ⊢ 𝐽 = (MetOpen‘𝐷) | |
4 | 3 | mopntop 23338 | . . . . 5 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ Top) |
5 | 2, 4 | syl 17 | . . . 4 ⊢ (𝜑 → 𝐽 ∈ Top) |
6 | 2 | adantr 484 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → 𝐷 ∈ (∞Met‘𝑋)) |
7 | metnrmlem.3 | . . . . . . . . 9 ⊢ (𝜑 → 𝑇 ∈ (Clsd‘𝐽)) | |
8 | eqid 2737 | . . . . . . . . . 10 ⊢ ∪ 𝐽 = ∪ 𝐽 | |
9 | 8 | cldss 21926 | . . . . . . . . 9 ⊢ (𝑇 ∈ (Clsd‘𝐽) → 𝑇 ⊆ ∪ 𝐽) |
10 | 7, 9 | syl 17 | . . . . . . . 8 ⊢ (𝜑 → 𝑇 ⊆ ∪ 𝐽) |
11 | 3 | mopnuni 23339 | . . . . . . . . 9 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝑋 = ∪ 𝐽) |
12 | 2, 11 | syl 17 | . . . . . . . 8 ⊢ (𝜑 → 𝑋 = ∪ 𝐽) |
13 | 10, 12 | sseqtrrd 3942 | . . . . . . 7 ⊢ (𝜑 → 𝑇 ⊆ 𝑋) |
14 | 13 | sselda 3901 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → 𝑡 ∈ 𝑋) |
15 | metdscn.f | . . . . . . . . . 10 ⊢ 𝐹 = (𝑥 ∈ 𝑋 ↦ inf(ran (𝑦 ∈ 𝑆 ↦ (𝑥𝐷𝑦)), ℝ*, < )) | |
16 | metnrmlem.2 | . . . . . . . . . 10 ⊢ (𝜑 → 𝑆 ∈ (Clsd‘𝐽)) | |
17 | metnrmlem.4 | . . . . . . . . . 10 ⊢ (𝜑 → (𝑆 ∩ 𝑇) = ∅) | |
18 | 15, 3, 2, 16, 7, 17 | metnrmlem1a 23755 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (0 < (𝐹‘𝑡) ∧ if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) ∈ ℝ+)) |
19 | 18 | simprd 499 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) ∈ ℝ+) |
20 | 19 | rphalfcld 12640 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2) ∈ ℝ+) |
21 | 20 | rpxrd 12629 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2) ∈ ℝ*) |
22 | 3 | blopn 23398 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑡 ∈ 𝑋 ∧ (if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2) ∈ ℝ*) → (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
23 | 6, 14, 21, 22 | syl3anc 1373 | . . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
24 | 23 | ralrimiva 3105 | . . . 4 ⊢ (𝜑 → ∀𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
25 | iunopn 21795 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ ∀𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) → ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) | |
26 | 5, 24, 25 | syl2anc 587 | . . 3 ⊢ (𝜑 → ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
27 | 1, 26 | eqeltrid 2842 | . 2 ⊢ (𝜑 → 𝑈 ∈ 𝐽) |
28 | blcntr 23311 | . . . . . . 7 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑡 ∈ 𝑋 ∧ (if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2) ∈ ℝ+) → 𝑡 ∈ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) | |
29 | 6, 14, 20, 28 | syl3anc 1373 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → 𝑡 ∈ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
30 | 29 | snssd 4722 | . . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → {𝑡} ⊆ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
31 | 30 | ralrimiva 3105 | . . . 4 ⊢ (𝜑 → ∀𝑡 ∈ 𝑇 {𝑡} ⊆ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
32 | ss2iun 4922 | . . . 4 ⊢ (∀𝑡 ∈ 𝑇 {𝑡} ⊆ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) → ∪ 𝑡 ∈ 𝑇 {𝑡} ⊆ ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) | |
33 | 31, 32 | syl 17 | . . 3 ⊢ (𝜑 → ∪ 𝑡 ∈ 𝑇 {𝑡} ⊆ ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
34 | iunid 4969 | . . . 4 ⊢ ∪ 𝑡 ∈ 𝑇 {𝑡} = 𝑇 | |
35 | 34 | eqcomi 2746 | . . 3 ⊢ 𝑇 = ∪ 𝑡 ∈ 𝑇 {𝑡} |
36 | 33, 35, 1 | 3sstr4g 3946 | . 2 ⊢ (𝜑 → 𝑇 ⊆ 𝑈) |
37 | 27, 36 | jca 515 | 1 ⊢ (𝜑 → (𝑈 ∈ 𝐽 ∧ 𝑇 ⊆ 𝑈)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2110 ∀wral 3061 ∩ cin 3865 ⊆ wss 3866 ∅c0 4237 ifcif 4439 {csn 4541 ∪ cuni 4819 ∪ ciun 4904 class class class wbr 5053 ↦ cmpt 5135 ran crn 5552 ‘cfv 6380 (class class class)co 7213 infcinf 9057 0cc0 10729 1c1 10730 ℝ*cxr 10866 < clt 10867 ≤ cle 10868 / cdiv 11489 2c2 11885 ℝ+crp 12586 ∞Metcxmet 20348 ballcbl 20350 MetOpencmopn 20353 Topctop 21790 Clsdccld 21913 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 ax-pre-sup 10807 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-iin 4907 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-om 7645 df-1st 7761 df-2nd 7762 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-er 8391 df-map 8510 df-en 8627 df-dom 8628 df-sdom 8629 df-sup 9058 df-inf 9059 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-div 11490 df-nn 11831 df-2 11893 df-n0 12091 df-z 12177 df-uz 12439 df-q 12545 df-rp 12587 df-xneg 12704 df-xadd 12705 df-xmul 12706 df-icc 12942 df-topgen 16948 df-psmet 20355 df-xmet 20356 df-bl 20358 df-mopn 20359 df-top 21791 df-topon 21808 df-bases 21843 df-cld 21916 df-ntr 21917 df-cls 21918 |
This theorem is referenced by: metnrmlem3 23758 |
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