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Mirrors > Home > MPE Home > Th. List > xmetcl | 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 |
---|---|
xmetcl | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ*) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xmetf 22941 | . 2 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ*) | |
2 | fovrn 7320 | . 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 2114 × cxp 5555 ⟶wf 6353 ‘cfv 6357 (class class class)co 7158 ℝ*cxr 10676 ∞Metcxmet 20532 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-fv 6365 df-ov 7161 df-oprab 7162 df-mpo 7163 df-map 8410 df-xr 10681 df-xmet 20540 |
This theorem is referenced by: xmetge0 22956 xmetlecl 22958 xmetsym 22959 xmetrtri 22967 xmetrtri2 22968 xmetgt0 22970 prdsdsf 22979 prdsxmetlem 22980 imasdsf1olem 22985 imasf1oxmet 22987 xpsdsval 22993 xblpnf 23008 bldisj 23010 blgt0 23011 xblss2 23014 blhalf 23017 xbln0 23026 blin 23033 blss 23037 xmscl 23074 prdsbl 23103 blsscls2 23116 blcld 23117 blcls 23118 comet 23125 stdbdxmet 23127 stdbdmet 23128 stdbdbl 23129 tmsxpsval2 23151 metcnpi3 23158 txmetcnp 23159 xrsmopn 23422 metdcnlem 23446 metdsf 23458 metdsge 23459 metdstri 23461 metdsle 23462 metdscnlem 23465 metnrmlem1 23469 metnrmlem3 23471 lmnn 23868 iscfil2 23871 iscau3 23883 dvlip2 24594 heicant 34929 |
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