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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 22934 | . 2 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ) | |
2 | fovrn 7312 | . 2 ⊢ ((𝐷:(𝑋 × 𝑋)⟶ℝ ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) | |
3 | 1, 2 | syl3an1 1159 | 1 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1083 ∈ wcel 2110 × cxp 5548 ⟶wf 6346 ‘cfv 6350 (class class class)co 7150 ℝcr 10530 Metcmet 20525 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-cnex 10587 ax-resscn 10588 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-mpt 5140 df-id 5455 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-fv 6358 df-ov 7153 df-oprab 7154 df-mpo 7155 df-map 8402 df-met 20533 |
This theorem is referenced by: mettri2 22945 metrtri 22961 prdsmet 22974 imasf1omet 22980 blpnf 23001 bl2in 23004 mscl 23065 metss2lem 23115 methaus 23124 nmf2 23196 metdsre 23455 iscmet3lem1 23888 minveclem2 24023 minveclem3b 24025 minveclem3 24026 minveclem4 24029 minveclem7 24032 dvlog2lem 25229 vacn 28465 nmcvcn 28466 smcnlem 28468 blocni 28576 minvecolem2 28646 minvecolem3 28647 minvecolem4 28651 minvecolem7 28654 metf1o 35024 mettrifi 35026 lmclim2 35027 geomcau 35028 isbnd3 35056 isbnd3b 35057 ssbnd 35060 totbndbnd 35061 equivbnd 35062 prdsbnd 35065 heibor1lem 35081 heiborlem6 35088 bfplem1 35094 bfplem2 35095 bfp 35096 rrncmslem 35104 rrnequiv 35107 rrntotbnd 35108 ioorrnopnlem 42582 |
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