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Mirrors > Home > MPE Home > Th. List > xmetdcn | Structured version Visualization version GIF version |
Description: The metric function of an extended metric space is always continuous in the topology generated by it. (Contributed by Mario Carneiro, 4-Sep-2015.) |
Ref | Expression |
---|---|
xmetdcn2.1 | ⊢ 𝐽 = (MetOpen‘𝐷) |
xmetdcn.2 | ⊢ 𝐾 = (ordTop‘ ≤ ) |
Ref | Expression |
---|---|
xmetdcn | ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐷 ∈ ((𝐽 ×t 𝐽) Cn 𝐾)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xmetdcn.2 | . . . 4 ⊢ 𝐾 = (ordTop‘ ≤ ) | |
2 | letopon 23033 | . . . 4 ⊢ (ordTop‘ ≤ ) ∈ (TopOn‘ℝ*) | |
3 | 1, 2 | eqeltri 2821 | . . 3 ⊢ 𝐾 ∈ (TopOn‘ℝ*) |
4 | eqid 2724 | . . . . 5 ⊢ (dist‘ℝ*𝑠) = (dist‘ℝ*𝑠) | |
5 | eqid 2724 | . . . . 5 ⊢ (MetOpen‘(dist‘ℝ*𝑠)) = (MetOpen‘(dist‘ℝ*𝑠)) | |
6 | 4, 5 | xrsmopn 24652 | . . . 4 ⊢ (ordTop‘ ≤ ) ⊆ (MetOpen‘(dist‘ℝ*𝑠)) |
7 | 1, 6 | eqsstri 4009 | . . 3 ⊢ 𝐾 ⊆ (MetOpen‘(dist‘ℝ*𝑠)) |
8 | 4 | xrsxmet 24649 | . . . . 5 ⊢ (dist‘ℝ*𝑠) ∈ (∞Met‘ℝ*) |
9 | 5 | mopnuni 24271 | . . . . 5 ⊢ ((dist‘ℝ*𝑠) ∈ (∞Met‘ℝ*) → ℝ* = ∪ (MetOpen‘(dist‘ℝ*𝑠))) |
10 | 8, 9 | ax-mp 5 | . . . 4 ⊢ ℝ* = ∪ (MetOpen‘(dist‘ℝ*𝑠)) |
11 | 10 | cnss2 23105 | . . 3 ⊢ ((𝐾 ∈ (TopOn‘ℝ*) ∧ 𝐾 ⊆ (MetOpen‘(dist‘ℝ*𝑠))) → ((𝐽 ×t 𝐽) Cn (MetOpen‘(dist‘ℝ*𝑠))) ⊆ ((𝐽 ×t 𝐽) Cn 𝐾)) |
12 | 3, 7, 11 | mp2an 689 | . 2 ⊢ ((𝐽 ×t 𝐽) Cn (MetOpen‘(dist‘ℝ*𝑠))) ⊆ ((𝐽 ×t 𝐽) Cn 𝐾) |
13 | xmetdcn2.1 | . . 3 ⊢ 𝐽 = (MetOpen‘𝐷) | |
14 | 13, 4, 5 | xmetdcn2 24677 | . 2 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐷 ∈ ((𝐽 ×t 𝐽) Cn (MetOpen‘(dist‘ℝ*𝑠)))) |
15 | 12, 14 | sselid 3973 | 1 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐷 ∈ ((𝐽 ×t 𝐽) Cn 𝐾)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1533 ∈ wcel 2098 ⊆ wss 3941 ∪ cuni 4900 ‘cfv 6534 (class class class)co 7402 ℝ*cxr 11245 ≤ cle 11247 distcds 17207 ordTopcordt 17446 ℝ*𝑠cxrs 17447 ∞Metcxmet 21215 MetOpencmopn 21220 TopOnctopon 22736 Cn ccn 23052 ×t ctx 23388 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-rep 5276 ax-sep 5290 ax-nul 5297 ax-pow 5354 ax-pr 5418 ax-un 7719 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-rmo 3368 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3960 df-nul 4316 df-if 4522 df-pw 4597 df-sn 4622 df-pr 4624 df-tp 4626 df-op 4628 df-uni 4901 df-int 4942 df-iun 4990 df-iin 4991 df-br 5140 df-opab 5202 df-mpt 5223 df-tr 5257 df-id 5565 df-eprel 5571 df-po 5579 df-so 5580 df-fr 5622 df-se 5623 df-we 5624 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6291 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6486 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-isom 6543 df-riota 7358 df-ov 7405 df-oprab 7406 df-mpo 7407 df-of 7664 df-om 7850 df-1st 7969 df-2nd 7970 df-supp 8142 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-er 8700 df-ec 8702 df-map 8819 df-ixp 8889 df-en 8937 df-dom 8938 df-sdom 8939 df-fin 8940 df-fsupp 9359 df-fi 9403 df-sup 9434 df-inf 9435 df-oi 9502 df-card 9931 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11444 df-neg 11445 df-div 11870 df-nn 12211 df-2 12273 df-3 12274 df-4 12275 df-5 12276 df-6 12277 df-7 12278 df-8 12279 df-9 12280 df-n0 12471 df-z 12557 df-dec 12676 df-uz 12821 df-q 12931 df-rp 12973 df-xneg 13090 df-xadd 13091 df-xmul 13092 df-ioo 13326 df-ioc 13327 df-ico 13328 df-icc 13329 df-fz 13483 df-fzo 13626 df-seq 13965 df-exp 14026 df-hash 14289 df-cj 15044 df-re 15045 df-im 15046 df-sqrt 15180 df-abs 15181 df-struct 17081 df-sets 17098 df-slot 17116 df-ndx 17128 df-base 17146 df-ress 17175 df-plusg 17211 df-mulr 17212 df-sca 17214 df-vsca 17215 df-ip 17216 df-tset 17217 df-ple 17218 df-ds 17220 df-hom 17222 df-cco 17223 df-rest 17369 df-topn 17370 df-0g 17388 df-gsum 17389 df-topgen 17390 df-pt 17391 df-prds 17394 df-ordt 17448 df-xrs 17449 df-qtop 17454 df-imas 17455 df-xps 17457 df-mre 17531 df-mrc 17532 df-acs 17534 df-ps 18523 df-tsr 18524 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-submnd 18706 df-mulg 18988 df-cntz 19225 df-cmn 19694 df-psmet 21222 df-xmet 21223 df-met 21224 df-bl 21225 df-mopn 21226 df-top 22720 df-topon 22737 df-topsp 22759 df-bases 22773 df-cn 23055 df-cnp 23056 df-tx 23390 df-hmeo 23583 df-xms 24150 df-tms 24152 |
This theorem is referenced by: metdcn2 24679 |
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