Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > cmetcau | Structured version Visualization version GIF version |
Description: The convergence of a Cauchy sequence in a complete metric space. (Contributed by NM, 19-Dec-2006.) (Revised by Mario Carneiro, 14-Oct-2015.) |
Ref | Expression |
---|---|
cmetcau.1 | ⊢ 𝐽 = (MetOpen‘𝐷) |
Ref | Expression |
---|---|
cmetcau | ⊢ ((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) → 𝐹 ∈ dom (⇝𝑡‘𝐽)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cmetmet 24440 | . . . . 5 ⊢ (𝐷 ∈ (CMet‘𝑋) → 𝐷 ∈ (Met‘𝑋)) | |
2 | metxmet 23477 | . . . . 5 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷 ∈ (∞Met‘𝑋)) | |
3 | 1, 2 | syl 17 | . . . 4 ⊢ (𝐷 ∈ (CMet‘𝑋) → 𝐷 ∈ (∞Met‘𝑋)) |
4 | caun0 24435 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) → 𝑋 ≠ ∅) | |
5 | 3, 4 | sylan 580 | . . 3 ⊢ ((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) → 𝑋 ≠ ∅) |
6 | n0 4286 | . . 3 ⊢ (𝑋 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ 𝑋) | |
7 | 5, 6 | sylib 217 | . 2 ⊢ ((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) → ∃𝑥 𝑥 ∈ 𝑋) |
8 | cmetcau.1 | . . 3 ⊢ 𝐽 = (MetOpen‘𝐷) | |
9 | simpll 764 | . . 3 ⊢ (((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) ∧ 𝑥 ∈ 𝑋) → 𝐷 ∈ (CMet‘𝑋)) | |
10 | simpr 485 | . . 3 ⊢ (((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) ∧ 𝑥 ∈ 𝑋) → 𝑥 ∈ 𝑋) | |
11 | simplr 766 | . . 3 ⊢ (((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) ∧ 𝑥 ∈ 𝑋) → 𝐹 ∈ (Cau‘𝐷)) | |
12 | eqid 2740 | . . 3 ⊢ (𝑦 ∈ ℕ ↦ if(𝑦 ∈ dom 𝐹, (𝐹‘𝑦), 𝑥)) = (𝑦 ∈ ℕ ↦ if(𝑦 ∈ dom 𝐹, (𝐹‘𝑦), 𝑥)) | |
13 | 8, 9, 10, 11, 12 | cmetcaulem 24442 | . 2 ⊢ (((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) ∧ 𝑥 ∈ 𝑋) → 𝐹 ∈ dom (⇝𝑡‘𝐽)) |
14 | 7, 13 | exlimddv 1942 | 1 ⊢ ((𝐷 ∈ (CMet‘𝑋) ∧ 𝐹 ∈ (Cau‘𝐷)) → 𝐹 ∈ dom (⇝𝑡‘𝐽)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1542 ∃wex 1786 ∈ wcel 2110 ≠ wne 2945 ∅c0 4262 ifcif 4465 ↦ cmpt 5162 dom cdm 5589 ‘cfv 6431 ℕcn 11965 ∞Metcxmet 20572 Metcmet 20573 MetOpencmopn 20577 ⇝𝑡clm 22367 Cauccau 24407 CMetccmet 24408 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-rep 5214 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7580 ax-cnex 10920 ax-resscn 10921 ax-1cn 10922 ax-icn 10923 ax-addcl 10924 ax-addrcl 10925 ax-mulcl 10926 ax-mulrcl 10927 ax-mulcom 10928 ax-addass 10929 ax-mulass 10930 ax-distr 10931 ax-i2m1 10932 ax-1ne0 10933 ax-1rid 10934 ax-rnegex 10935 ax-rrecex 10936 ax-cnre 10937 ax-pre-lttri 10938 ax-pre-lttrn 10939 ax-pre-ltadd 10940 ax-pre-mulgt0 10941 ax-pre-sup 10942 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rmo 3074 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4846 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6200 df-ord 6267 df-on 6268 df-lim 6269 df-suc 6270 df-iota 6389 df-fun 6433 df-fn 6434 df-f 6435 df-f1 6436 df-fo 6437 df-f1o 6438 df-fv 6439 df-riota 7226 df-ov 7272 df-oprab 7273 df-mpo 7274 df-om 7702 df-1st 7818 df-2nd 7819 df-frecs 8082 df-wrecs 8113 df-recs 8187 df-rdg 8226 df-er 8473 df-map 8592 df-pm 8593 df-en 8709 df-dom 8710 df-sdom 8711 df-sup 9171 df-inf 9172 df-pnf 11004 df-mnf 11005 df-xr 11006 df-ltxr 11007 df-le 11008 df-sub 11199 df-neg 11200 df-div 11625 df-nn 11966 df-2 12028 df-n0 12226 df-z 12312 df-uz 12574 df-q 12680 df-rp 12722 df-xneg 12839 df-xadd 12840 df-xmul 12841 df-ico 13076 df-rest 17123 df-topgen 17144 df-psmet 20579 df-xmet 20580 df-met 20581 df-bl 20582 df-mopn 20583 df-fbas 20584 df-fg 20585 df-top 22033 df-topon 22050 df-bases 22086 df-ntr 22161 df-nei 22239 df-lm 22370 df-fil 22987 df-fm 23079 df-flim 23080 df-flf 23081 df-cfil 24409 df-cau 24410 df-cmet 24411 |
This theorem is referenced by: iscmet3 24447 iscmet2 24448 bcthlem4 24481 minvecolem4a 29227 hlcompl 29265 heiborlem9 35965 bfplem1 35968 |
Copyright terms: Public domain | W3C validator |