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Mirrors > Home > MPE Home > Th. List > metcl | Structured version Visualization version GIF version |
Description: Closure of the distance function of a metric space. Part of Property M1 of [Kreyszig] p. 3. (Contributed by NM, 30-Aug-2006.) |
Ref | Expression |
---|---|
metcl | ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | metf 21945 | . 2 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ) | |
2 | fovrn 6702 | . 2 ⊢ ((𝐷:(𝑋 × 𝑋)⟶ℝ ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) | |
3 | 1, 2 | syl3an1 1351 | 1 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1031 ∈ wcel 1977 × cxp 5036 ⟶wf 5800 ‘cfv 5804 (class class class)co 6549 ℝcr 9814 Metcme 19553 |
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-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 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-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-map 7746 df-met 19561 |
This theorem is referenced by: mettri2 21956 metrtri 21972 prdsmet 21985 imasf1omet 21991 blpnf 22012 bl2in 22015 mscl 22076 metss2lem 22126 methaus 22135 nmf2 22207 metdsre 22464 iscmet3lem1 22897 minveclem2 23005 minveclem3b 23007 minveclem3 23008 minveclem4 23011 minveclem7 23014 dvlog2lem 24198 vacn 26933 nmcvcn 26934 smcnlem 26936 blocni 27044 minvecolem2 27115 minvecolem3 27116 minvecolem4 27120 minvecolem7 27123 metf1o 32721 mettrifi 32723 lmclim2 32724 geomcau 32725 isbnd3 32753 isbnd3b 32754 ssbnd 32757 totbndbnd 32758 equivbnd 32759 prdsbnd 32762 heibor1lem 32778 heiborlem6 32785 bfplem1 32791 bfplem2 32792 bfp 32793 rrncmslem 32801 rrnequiv 32804 rrntotbnd 32805 ioorrnopnlem 39200 |
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