![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > metnrmlem2 | Structured version Visualization version GIF version |
Description: Lemma for metnrm 24765. (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 24333 | . . . . 5 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ Top) |
5 | 2, 4 | syl 17 | . . . 4 ⊢ (𝜑 → 𝐽 ∈ Top) |
6 | 2 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → 𝐷 ∈ (∞Met‘𝑋)) |
7 | metnrmlem.3 | . . . . . . . . 9 ⊢ (𝜑 → 𝑇 ∈ (Clsd‘𝐽)) | |
8 | eqid 2727 | . . . . . . . . . 10 ⊢ ∪ 𝐽 = ∪ 𝐽 | |
9 | 8 | cldss 22920 | . . . . . . . . 9 ⊢ (𝑇 ∈ (Clsd‘𝐽) → 𝑇 ⊆ ∪ 𝐽) |
10 | 7, 9 | syl 17 | . . . . . . . 8 ⊢ (𝜑 → 𝑇 ⊆ ∪ 𝐽) |
11 | 3 | mopnuni 24334 | . . . . . . . . 9 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝑋 = ∪ 𝐽) |
12 | 2, 11 | syl 17 | . . . . . . . 8 ⊢ (𝜑 → 𝑋 = ∪ 𝐽) |
13 | 10, 12 | sseqtrrd 4019 | . . . . . . 7 ⊢ (𝜑 → 𝑇 ⊆ 𝑋) |
14 | 13 | sselda 3978 | . . . . . 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 24761 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (0 < (𝐹‘𝑡) ∧ if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) ∈ ℝ+)) |
19 | 18 | simprd 495 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) ∈ ℝ+) |
20 | 19 | rphalfcld 13052 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2) ∈ ℝ+) |
21 | 20 | rpxrd 13041 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2) ∈ ℝ*) |
22 | 3 | blopn 24396 | . . . . . 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 1369 | . . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
24 | 23 | ralrimiva 3141 | . . . 4 ⊢ (𝜑 → ∀𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
25 | iunopn 22787 | . . . 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 583 | . . 3 ⊢ (𝜑 → ∪ 𝑡 ∈ 𝑇 (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2)) ∈ 𝐽) |
27 | 1, 26 | eqeltrid 2832 | . 2 ⊢ (𝜑 → 𝑈 ∈ 𝐽) |
28 | blcntr 24306 | . . . . . . 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 1369 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → 𝑡 ∈ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
30 | 29 | snssd 4808 | . . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝑇) → {𝑡} ⊆ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
31 | 30 | ralrimiva 3141 | . . . 4 ⊢ (𝜑 → ∀𝑡 ∈ 𝑇 {𝑡} ⊆ (𝑡(ball‘𝐷)(if(1 ≤ (𝐹‘𝑡), 1, (𝐹‘𝑡)) / 2))) |
32 | ss2iun 5009 | . . . 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 5057 | . . . 4 ⊢ ∪ 𝑡 ∈ 𝑇 {𝑡} = 𝑇 | |
35 | 34 | eqcomi 2736 | . . 3 ⊢ 𝑇 = ∪ 𝑡 ∈ 𝑇 {𝑡} |
36 | 33, 35, 1 | 3sstr4g 4023 | . 2 ⊢ (𝜑 → 𝑇 ⊆ 𝑈) |
37 | 27, 36 | jca 511 | 1 ⊢ (𝜑 → (𝑈 ∈ 𝐽 ∧ 𝑇 ⊆ 𝑈)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ∀wral 3056 ∩ cin 3943 ⊆ wss 3944 ∅c0 4318 ifcif 4524 {csn 4624 ∪ cuni 4903 ∪ ciun 4991 class class class wbr 5142 ↦ cmpt 5225 ran crn 5673 ‘cfv 6542 (class class class)co 7414 infcinf 9456 0cc0 11130 1c1 11131 ℝ*cxr 11269 < clt 11270 ≤ cle 11271 / cdiv 11893 2c2 12289 ℝ+crp 12998 ∞Metcxmet 21251 ballcbl 21253 MetOpencmopn 21256 Topctop 22782 Clsdccld 22907 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-cnex 11186 ax-resscn 11187 ax-1cn 11188 ax-icn 11189 ax-addcl 11190 ax-addrcl 11191 ax-mulcl 11192 ax-mulrcl 11193 ax-mulcom 11194 ax-addass 11195 ax-mulass 11196 ax-distr 11197 ax-i2m1 11198 ax-1ne0 11199 ax-1rid 11200 ax-rnegex 11201 ax-rrecex 11202 ax-cnre 11203 ax-pre-lttri 11204 ax-pre-lttrn 11205 ax-pre-ltadd 11206 ax-pre-mulgt0 11207 ax-pre-sup 11208 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-rmo 3371 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-iin 4994 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8718 df-map 8838 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9457 df-inf 9458 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11468 df-neg 11469 df-div 11894 df-nn 12235 df-2 12297 df-n0 12495 df-z 12581 df-uz 12845 df-q 12955 df-rp 12999 df-xneg 13116 df-xadd 13117 df-xmul 13118 df-icc 13355 df-topgen 17416 df-psmet 21258 df-xmet 21259 df-bl 21261 df-mopn 21262 df-top 22783 df-topon 22800 df-bases 22836 df-cld 22910 df-ntr 22911 df-cls 22912 |
This theorem is referenced by: metnrmlem3 24764 |
Copyright terms: Public domain | W3C validator |