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Mirrors > Home > MPE Home > Th. List > msdcn | Structured version Visualization version GIF version |
Description: The metric function of a metric space is always continuous in the topology generated by it. (Contributed by Mario Carneiro, 5-May-2014.) (Revised by Mario Carneiro, 5-Oct-2015.) |
Ref | Expression |
---|---|
msdcn.x | ⊢ 𝑋 = (Base‘𝑀) |
msdcn.d | ⊢ 𝐷 = (dist‘𝑀) |
msdcn.j | ⊢ 𝐽 = (TopOpen‘𝑀) |
msdcn.2 | ⊢ 𝐾 = (topGen‘ran (,)) |
Ref | Expression |
---|---|
msdcn | ⊢ (𝑀 ∈ MetSp → (𝐷 ↾ (𝑋 × 𝑋)) ∈ ((𝐽 ×t 𝐽) Cn 𝐾)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | msdcn.x | . . . 4 ⊢ 𝑋 = (Base‘𝑀) | |
2 | msdcn.d | . . . 4 ⊢ 𝐷 = (dist‘𝑀) | |
3 | 1, 2 | msmet2 22075 | . . 3 ⊢ (𝑀 ∈ MetSp → (𝐷 ↾ (𝑋 × 𝑋)) ∈ (Met‘𝑋)) |
4 | eqid 2610 | . . . 4 ⊢ (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))) = (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))) | |
5 | msdcn.2 | . . . 4 ⊢ 𝐾 = (topGen‘ran (,)) | |
6 | 4, 5 | metdcn2 22450 | . . 3 ⊢ ((𝐷 ↾ (𝑋 × 𝑋)) ∈ (Met‘𝑋) → (𝐷 ↾ (𝑋 × 𝑋)) ∈ (((MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))) ×t (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋)))) Cn 𝐾)) |
7 | 3, 6 | syl 17 | . 2 ⊢ (𝑀 ∈ MetSp → (𝐷 ↾ (𝑋 × 𝑋)) ∈ (((MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))) ×t (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋)))) Cn 𝐾)) |
8 | msdcn.j | . . . . 5 ⊢ 𝐽 = (TopOpen‘𝑀) | |
9 | 2 | reseq1i 5313 | . . . . 5 ⊢ (𝐷 ↾ (𝑋 × 𝑋)) = ((dist‘𝑀) ↾ (𝑋 × 𝑋)) |
10 | 8, 1, 9 | mstopn 22067 | . . . 4 ⊢ (𝑀 ∈ MetSp → 𝐽 = (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋)))) |
11 | 10, 10 | oveq12d 6567 | . . 3 ⊢ (𝑀 ∈ MetSp → (𝐽 ×t 𝐽) = ((MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))) ×t (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))))) |
12 | 11 | oveq1d 6564 | . 2 ⊢ (𝑀 ∈ MetSp → ((𝐽 ×t 𝐽) Cn 𝐾) = (((MetOpen‘(𝐷 ↾ (𝑋 × 𝑋))) ×t (MetOpen‘(𝐷 ↾ (𝑋 × 𝑋)))) Cn 𝐾)) |
13 | 7, 12 | eleqtrrd 2691 | 1 ⊢ (𝑀 ∈ MetSp → (𝐷 ↾ (𝑋 × 𝑋)) ∈ ((𝐽 ×t 𝐽) Cn 𝐾)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1475 ∈ wcel 1977 × cxp 5036 ran crn 5039 ↾ cres 5040 ‘cfv 5804 (class class class)co 6549 (,)cioo 12046 Basecbs 15695 distcds 15777 TopOpenctopn 15905 topGenctg 15921 Metcme 19553 MetOpencmopn 19557 Cn ccn 20838 ×t ctx 21173 MetSpcmt 21933 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-iin 4458 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-of 6795 df-om 6958 df-1st 7059 df-2nd 7060 df-supp 7183 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-2o 7448 df-oadd 7451 df-er 7629 df-ec 7631 df-map 7746 df-ixp 7795 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-fsupp 8159 df-fi 8200 df-sup 8231 df-inf 8232 df-oi 8298 df-card 8648 df-cda 8873 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-4 10958 df-5 10959 df-6 10960 df-7 10961 df-8 10962 df-9 10963 df-n0 11170 df-z 11255 df-dec 11370 df-uz 11564 df-q 11665 df-rp 11709 df-xneg 11822 df-xadd 11823 df-xmul 11824 df-ioo 12050 df-ioc 12051 df-ico 12052 df-icc 12053 df-fz 12198 df-fzo 12335 df-seq 12664 df-exp 12723 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-struct 15697 df-ndx 15698 df-slot 15699 df-base 15700 df-sets 15701 df-ress 15702 df-plusg 15781 df-mulr 15782 df-sca 15784 df-vsca 15785 df-ip 15786 df-tset 15787 df-ple 15788 df-ds 15791 df-hom 15793 df-cco 15794 df-rest 15906 df-topn 15907 df-0g 15925 df-gsum 15926 df-topgen 15927 df-pt 15928 df-prds 15931 df-ordt 15984 df-xrs 15985 df-qtop 15990 df-imas 15991 df-xps 15993 df-mre 16069 df-mrc 16070 df-acs 16072 df-ps 17023 df-tsr 17024 df-mgm 17065 df-sgrp 17107 df-mnd 17118 df-submnd 17159 df-mulg 17364 df-cntz 17573 df-cmn 18018 df-psmet 19559 df-xmet 19560 df-met 19561 df-bl 19562 df-mopn 19563 df-top 20521 df-bases 20522 df-topon 20523 df-topsp 20524 df-cn 20841 df-cnp 20842 df-tx 21175 df-hmeo 21368 df-xms 21935 df-ms 21936 df-tms 21937 |
This theorem is referenced by: cnmpt1ds 22453 cnmpt2ds 22454 |
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