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| Mirrors > Home > HSE Home > Th. List > h2hcau | Structured version Visualization version GIF version | ||
| Description: The Cauchy sequences of Hilbert space. (Contributed by NM, 6-Jun-2008.) (Revised by Mario Carneiro, 13-May-2014.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| h2hc.1 | ⊢ 𝑈 = 〈〈 +ℎ , ·ℎ 〉, normℎ〉 |
| h2hc.2 | ⊢ 𝑈 ∈ NrmCVec |
| h2hc.3 | ⊢ ℋ = (BaseSet‘𝑈) |
| h2hc.4 | ⊢ 𝐷 = (IndMet‘𝑈) |
| Ref | Expression |
|---|---|
| h2hcau | ⊢ Cauchy = ((Cau‘𝐷) ∩ ( ℋ ↑m ℕ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rab 3416 | . 2 ⊢ {𝑓 ∈ ( ℋ ↑m ℕ) ∣ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥} = {𝑓 ∣ (𝑓 ∈ ( ℋ ↑m ℕ) ∧ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)} | |
| 2 | df-hcau 31336 | . 2 ⊢ Cauchy = {𝑓 ∈ ( ℋ ↑m ℕ) ∣ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥} | |
| 3 | elin 3920 | . . . 4 ⊢ (𝑓 ∈ ((Cau‘𝐷) ∩ ( ℋ ↑m ℕ)) ↔ (𝑓 ∈ (Cau‘𝐷) ∧ 𝑓 ∈ ( ℋ ↑m ℕ))) | |
| 4 | ancom 465 | . . . 4 ⊢ ((𝑓 ∈ (Cau‘𝐷) ∧ 𝑓 ∈ ( ℋ ↑m ℕ)) ↔ (𝑓 ∈ ( ℋ ↑m ℕ) ∧ 𝑓 ∈ (Cau‘𝐷))) | |
| 5 | h2hc.3 | . . . . . . . 8 ⊢ ℋ = (BaseSet‘𝑈) | |
| 6 | 5 | hlex 31261 | . . . . . . 7 ⊢ ℋ ∈ V |
| 7 | nnex 12245 | . . . . . . 7 ⊢ ℕ ∈ V | |
| 8 | 6, 7 | elmap 8867 | . . . . . 6 ⊢ (𝑓 ∈ ( ℋ ↑m ℕ) ↔ 𝑓:ℕ⟶ ℋ) |
| 9 | nnuz 12907 | . . . . . . . 8 ⊢ ℕ = (ℤ≥‘1) | |
| 10 | h2hc.2 | . . . . . . . . 9 ⊢ 𝑈 ∈ NrmCVec | |
| 11 | h2hc.4 | . . . . . . . . . 10 ⊢ 𝐷 = (IndMet‘𝑈) | |
| 12 | 5, 11 | imsxmet 31055 | . . . . . . . . 9 ⊢ (𝑈 ∈ NrmCVec → 𝐷 ∈ (∞Met‘ ℋ)) |
| 13 | 10, 12 | mp1i 14 | . . . . . . . 8 ⊢ (𝑓:ℕ⟶ ℋ → 𝐷 ∈ (∞Met‘ ℋ)) |
| 14 | 1zzd 12631 | . . . . . . . 8 ⊢ (𝑓:ℕ⟶ ℋ → 1 ∈ ℤ) | |
| 15 | eqidd 2763 | . . . . . . . 8 ⊢ ((𝑓:ℕ⟶ ℋ ∧ 𝑘 ∈ ℕ) → (𝑓‘𝑘) = (𝑓‘𝑘)) | |
| 16 | eqidd 2763 | . . . . . . . 8 ⊢ ((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) → (𝑓‘𝑗) = (𝑓‘𝑗)) | |
| 17 | id 23 | . . . . . . . 8 ⊢ (𝑓:ℕ⟶ ℋ → 𝑓:ℕ⟶ ℋ) | |
| 18 | 9, 13, 14, 15, 16, 17 | iscauf 25450 | . . . . . . 7 ⊢ (𝑓:ℕ⟶ ℋ → (𝑓 ∈ (Cau‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)((𝑓‘𝑗)𝐷(𝑓‘𝑘)) < 𝑥)) |
| 19 | ffvelcdm 7076 | . . . . . . . . . . . . 13 ⊢ ((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) → (𝑓‘𝑗) ∈ ℋ) | |
| 20 | 19 | adantr 485 | . . . . . . . . . . . 12 ⊢ (((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → (𝑓‘𝑗) ∈ ℋ) |
| 21 | eluznn 12948 | . . . . . . . . . . . . . 14 ⊢ ((𝑗 ∈ ℕ ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → 𝑘 ∈ ℕ) | |
| 22 | ffvelcdm 7076 | . . . . . . . . . . . . . 14 ⊢ ((𝑓:ℕ⟶ ℋ ∧ 𝑘 ∈ ℕ) → (𝑓‘𝑘) ∈ ℋ) | |
| 23 | 21, 22 | sylan2 604 | . . . . . . . . . . . . 13 ⊢ ((𝑓:ℕ⟶ ℋ ∧ (𝑗 ∈ ℕ ∧ 𝑘 ∈ (ℤ≥‘𝑗))) → (𝑓‘𝑘) ∈ ℋ) |
| 24 | 23 | anassrs 472 | . . . . . . . . . . . 12 ⊢ (((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → (𝑓‘𝑘) ∈ ℋ) |
| 25 | h2hc.1 | . . . . . . . . . . . . 13 ⊢ 𝑈 = 〈〈 +ℎ , ·ℎ 〉, normℎ〉 | |
| 26 | 25, 10, 5, 11 | h2hmetdval 31341 | . . . . . . . . . . . 12 ⊢ (((𝑓‘𝑗) ∈ ℋ ∧ (𝑓‘𝑘) ∈ ℋ) → ((𝑓‘𝑗)𝐷(𝑓‘𝑘)) = (normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘)))) |
| 27 | 20, 24, 26 | syl2anc 595 | . . . . . . . . . . 11 ⊢ (((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → ((𝑓‘𝑗)𝐷(𝑓‘𝑘)) = (normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘)))) |
| 28 | 27 | breq1d 5118 | . . . . . . . . . 10 ⊢ (((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → (((𝑓‘𝑗)𝐷(𝑓‘𝑘)) < 𝑥 ↔ (normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 29 | 28 | ralbidva 3185 | . . . . . . . . 9 ⊢ ((𝑓:ℕ⟶ ℋ ∧ 𝑗 ∈ ℕ) → (∀𝑘 ∈ (ℤ≥‘𝑗)((𝑓‘𝑗)𝐷(𝑓‘𝑘)) < 𝑥 ↔ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 30 | 29 | rexbidva 3186 | . . . . . . . 8 ⊢ (𝑓:ℕ⟶ ℋ → (∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)((𝑓‘𝑗)𝐷(𝑓‘𝑘)) < 𝑥 ↔ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 31 | 30 | ralbidv 3187 | . . . . . . 7 ⊢ (𝑓:ℕ⟶ ℋ → (∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)((𝑓‘𝑗)𝐷(𝑓‘𝑘)) < 𝑥 ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 32 | 18, 31 | bitrd 282 | . . . . . 6 ⊢ (𝑓:ℕ⟶ ℋ → (𝑓 ∈ (Cau‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 33 | 8, 32 | sylbi 220 | . . . . 5 ⊢ (𝑓 ∈ ( ℋ ↑m ℕ) → (𝑓 ∈ (Cau‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 34 | 33 | pm5.32i 584 | . . . 4 ⊢ ((𝑓 ∈ ( ℋ ↑m ℕ) ∧ 𝑓 ∈ (Cau‘𝐷)) ↔ (𝑓 ∈ ( ℋ ↑m ℕ) ∧ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 35 | 3, 4, 34 | 3bitri 300 | . . 3 ⊢ (𝑓 ∈ ((Cau‘𝐷) ∩ ( ℋ ↑m ℕ)) ↔ (𝑓 ∈ ( ℋ ↑m ℕ) ∧ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)) |
| 36 | 35 | eqabi 2897 | . 2 ⊢ ((Cau‘𝐷) ∩ ( ℋ ↑m ℕ)) = {𝑓 ∣ (𝑓 ∈ ( ℋ ↑m ℕ) ∧ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑗)(normℎ‘((𝑓‘𝑗) −ℎ (𝑓‘𝑘))) < 𝑥)} |
| 37 | 1, 2, 36 | 3eqtr4i 2795 | 1 ⊢ Cauchy = ((Cau‘𝐷) ∩ ( ℋ ↑m ℕ)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 400 = wceq 1569 ∈ wcel 2142 {cab 2740 ∀wral 3078 ∃wrex 3088 {crab 3415 ∩ cin 3903 〈cop 4594 class class class wbr 5108 ⟶wf 6532 ‘cfv 6536 (class class class)co 7412 ↑m cmap 8822 1c1 11107 < clt 11249 ℕcn 12239 ℤ≥cuz 12868 ℝ+crp 13022 ∞Metcxmet 21518 Cauccau 25423 NrmCVeccnv 30947 BaseSetcba 30949 IndMetcims 30954 ℋchba 31282 +ℎ cva 31283 ·ℎ csm 31284 normℎcno 31286 −ℎ cmv 31288 Cauchyccauold 31289 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 ax-mulf 11186 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7861 df-1st 7984 df-2nd 7985 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-er 8692 df-map 8824 df-pm 8825 df-en 8942 df-dom 8943 df-sdom 8944 df-sup 9400 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-div 11878 df-nn 12240 df-2 12309 df-3 12310 df-n0 12511 df-z 12598 df-uz 12869 df-rp 13023 df-xneg 13143 df-xadd 13144 df-seq 14045 df-exp 14105 df-cj 15157 df-re 15158 df-im 15159 df-sqrt 15293 df-abs 15294 df-psmet 21525 df-xmet 21526 df-met 21527 df-bl 21528 df-cau 25426 df-grpo 30856 df-gid 30857 df-ginv 30858 df-gdiv 30859 df-ablo 30908 df-vc 30922 df-nv 30955 df-va 30958 df-ba 30959 df-sm 30960 df-0v 30961 df-vs 30962 df-nmcv 30963 df-ims 30964 df-hvsub 31334 df-hcau 31336 |
| This theorem is used by: axhcompl-zf 31361 hhcau 31561 |
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