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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 22937 | . 2 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ) | |
2 | fovrn 7298 | . 2 ⊢ ((𝐷:(𝑋 × 𝑋)⟶ℝ ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) | |
3 | 1, 2 | syl3an1 1160 | 1 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1084 ∈ wcel 2111 × cxp 5517 ⟶wf 6320 ‘cfv 6324 (class class class)co 7135 ℝcr 10525 Metcmet 20077 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-cnex 10582 ax-resscn 10583 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-fv 6332 df-ov 7138 df-oprab 7139 df-mpo 7140 df-map 8391 df-met 20085 |
This theorem is referenced by: mettri2 22948 metrtri 22964 prdsmet 22977 imasf1omet 22983 blpnf 23004 bl2in 23007 mscl 23068 metss2lem 23118 methaus 23127 nmf2 23199 metdsre 23458 iscmet3lem1 23895 minveclem2 24030 minveclem3b 24032 minveclem3 24033 minveclem4 24036 minveclem7 24039 dvlog2lem 25243 vacn 28477 nmcvcn 28478 smcnlem 28480 blocni 28588 minvecolem2 28658 minvecolem3 28659 minvecolem4 28663 minvecolem7 28666 metf1o 35193 mettrifi 35195 lmclim2 35196 geomcau 35197 isbnd3 35222 isbnd3b 35223 ssbnd 35226 totbndbnd 35227 equivbnd 35228 prdsbnd 35231 heibor1lem 35247 heiborlem6 35254 bfplem1 35260 bfplem2 35261 bfp 35262 rrncmslem 35270 rrnequiv 35273 rrntotbnd 35274 ioorrnopnlem 42946 |
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