| Hilbert Space Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > HSE Home > Th. List > lnfncnbd | Structured version Visualization version GIF version | ||
| Description: A linear functional is continuous iff it is bounded. (Contributed by NM, 25-Apr-2006.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| lnfncnbd | ⊢ (𝑇 ∈ LinFn → (𝑇 ∈ ContFn ↔ (normfn‘𝑇) ∈ ℝ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nmcfnex 32258 | . . 3 ⊢ ((𝑇 ∈ LinFn ∧ 𝑇 ∈ ContFn) → (normfn‘𝑇) ∈ ℝ) | |
| 2 | 1 | ex 416 | . 2 ⊢ (𝑇 ∈ LinFn → (𝑇 ∈ ContFn → (normfn‘𝑇) ∈ ℝ)) |
| 3 | simpr 488 | . . . . 5 ⊢ ((𝑇 ∈ LinFn ∧ (normfn‘𝑇) ∈ ℝ) → (normfn‘𝑇) ∈ ℝ) | |
| 4 | nmbdfnlb 32255 | . . . . . . 7 ⊢ ((𝑇 ∈ LinFn ∧ (normfn‘𝑇) ∈ ℝ ∧ 𝑦 ∈ ℋ) → (abs‘(𝑇‘𝑦)) ≤ ((normfn‘𝑇) · (normℎ‘𝑦))) | |
| 5 | 4 | 3expa 1132 | . . . . . 6 ⊢ (((𝑇 ∈ LinFn ∧ (normfn‘𝑇) ∈ ℝ) ∧ 𝑦 ∈ ℋ) → (abs‘(𝑇‘𝑦)) ≤ ((normfn‘𝑇) · (normℎ‘𝑦))) |
| 6 | 5 | ralrimiva 3156 | . . . . 5 ⊢ ((𝑇 ∈ LinFn ∧ (normfn‘𝑇) ∈ ℝ) → ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ ((normfn‘𝑇) · (normℎ‘𝑦))) |
| 7 | oveq1 7405 | . . . . . . . 8 ⊢ (𝑥 = (normfn‘𝑇) → (𝑥 · (normℎ‘𝑦)) = ((normfn‘𝑇) · (normℎ‘𝑦))) | |
| 8 | 7 | breq2d 5114 | . . . . . . 7 ⊢ (𝑥 = (normfn‘𝑇) → ((abs‘(𝑇‘𝑦)) ≤ (𝑥 · (normℎ‘𝑦)) ↔ (abs‘(𝑇‘𝑦)) ≤ ((normfn‘𝑇) · (normℎ‘𝑦)))) |
| 9 | 8 | ralbidv 3187 | . . . . . 6 ⊢ (𝑥 = (normfn‘𝑇) → (∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ (𝑥 · (normℎ‘𝑦)) ↔ ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ ((normfn‘𝑇) · (normℎ‘𝑦)))) |
| 10 | 9 | rspcev 3583 | . . . . 5 ⊢ (((normfn‘𝑇) ∈ ℝ ∧ ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ ((normfn‘𝑇) · (normℎ‘𝑦))) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ (𝑥 · (normℎ‘𝑦))) |
| 11 | 3, 6, 10 | syl2anc 593 | . . . 4 ⊢ ((𝑇 ∈ LinFn ∧ (normfn‘𝑇) ∈ ℝ) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ (𝑥 · (normℎ‘𝑦))) |
| 12 | 11 | ex 416 | . . 3 ⊢ (𝑇 ∈ LinFn → ((normfn‘𝑇) ∈ ℝ → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ (𝑥 · (normℎ‘𝑦)))) |
| 13 | lnfncon 32261 | . . 3 ⊢ (𝑇 ∈ LinFn → (𝑇 ∈ ContFn ↔ ∃𝑥 ∈ ℝ ∀𝑦 ∈ ℋ (abs‘(𝑇‘𝑦)) ≤ (𝑥 · (normℎ‘𝑦)))) | |
| 14 | 12, 13 | sylibrd 261 | . 2 ⊢ (𝑇 ∈ LinFn → ((normfn‘𝑇) ∈ ℝ → 𝑇 ∈ ContFn)) |
| 15 | 2, 14 | impbid 214 | 1 ⊢ (𝑇 ∈ LinFn → (𝑇 ∈ ContFn ↔ (normfn‘𝑇) ∈ ℝ)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1562 ∈ wcel 2144 ∀wral 3078 ∃wrex 3088 class class class wbr 5102 ‘cfv 6523 (class class class)co 7398 ℝcr 11074 · cmul 11080 ≤ cle 11219 abscabs 15263 ℋchba 31124 normℎcno 31128 normfncnmf 31156 ContFnccnfn 31158 LinFnclf 31159 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153 ax-hilex 31204 ax-hfvadd 31205 ax-hv0cl 31208 ax-hvaddid 31209 ax-hfvmul 31210 ax-hvmulid 31211 ax-hvmulass 31212 ax-hvmul0 31215 ax-hfi 31284 ax-his1 31287 ax-his3 31289 ax-his4 31290 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-riota 7355 df-ov 7401 df-oprab 7402 df-mpo 7403 df-om 7849 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-rdg 8383 df-er 8680 df-map 8812 df-en 8930 df-dom 8931 df-sdom 8932 df-sup 9390 df-pnf 11220 df-mnf 11221 df-xr 11222 df-ltxr 11223 df-le 11224 df-sub 11418 df-neg 11419 df-div 11847 df-nn 12213 df-2 12282 df-3 12283 df-n0 12484 df-z 12571 df-uz 12842 df-rp 12996 df-seq 14017 df-exp 14077 df-cj 15128 df-re 15129 df-im 15130 df-sqrt 15264 df-abs 15265 df-hnorm 31173 df-hvsub 31176 df-nmfn 32050 df-cnfn 32052 df-lnfn 32053 |
| This theorem is referenced by: riesz1 32270 riesz2 32271 rnbra 32312 |
| Copyright terms: Public domain | W3C validator |