| 查看: 1521 | 回復(fù): 12 | ||
felix2018鐵桿木蟲 (正式寫手)
|
[求助]
各位學(xué)泛函的大神們請進!有六道小題希望可以幫忙! 已有2人參與
|
此六道題都是泛函分析的習(xí)題,希望各位大神可以幫幫忙。 由于自己輸入的問題,所以在括號做了個解釋! )1.show that if x is compact,then given ε<0,there exist a finite set of points{xi}∈X,(i為下標)can be approximated to within ε by one of the xi for each x∈X,there is an xi such that |x-xi|<=ε 2.if Ωis bounded,what is the completion of Cc0 (空間下標c上標0)in the supremum norm?deduce that C2 0(空間下標2上標0)is not a banach space with this norm,treat similarly the case Ω=R m(m維歐式空間) 3.show that given s∈S(Ω),1<=p<∞,and ε>0,there exists an f∈C2 0(上標0下標2),such that ||f-s||Lp<ε(下標Lp空間),such that any point x∈X 4.let kㄈH(k屬于H),be a convex cone with vertex at 0.i.e,0∈k and λu+μv∈k,any λ,μ>0,any u, v∈k,assume in addition that k is closed.given f∈H,prove that u=Pk f (f在k上的投影)in characterized by the following properties.any u∈k,(f-u,v)<=0,any v∈k and (f-u,u)=0 5.let Ω be a measure space and let h:Ω→[0,∞) be a measurable function .let k={u∈L2(Ω),|u(x)|<=h(x),a.e.on Ω}(2為上標L2空間)check that k is a nonempty closed convex set in H=L2(Ω).determine Pk. 6.let cㄈH be a nonempty closed convex set and let T:c→c,be a monlinear contraction i.e |Tu-Tv|<=|u-v|,any u,v∈c 1)let {un}(n為下標)be a sequence in c such that un→u weakly and |un-Tun|→f Strong prove that u→Tu=f 2)deduce that if c is bounded and T(c)ㄈc,then T has a fixed point. [ Last edited by felix2018 on 2013-12-21 at 10:19 ] |

木蟲 (著名寫手)
鐵桿木蟲 (正式寫手)

|
本帖內(nèi)容被屏蔽 |
|
本帖內(nèi)容被屏蔽 |
鐵桿木蟲 (正式寫手)

|
本帖內(nèi)容被屏蔽 |
鐵桿木蟲 (正式寫手)

|
本帖內(nèi)容被屏蔽 |
鐵桿木蟲 (正式寫手)

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 求調(diào)劑院校信息 +4 | CX 330 2026-03-21 | 4/200 |
|
|---|---|---|---|---|
|
[考研] 求調(diào)劑 +3 | 13341 2026-03-20 | 3/150 |
|
|
[考研] 【考研調(diào)劑】化學(xué)專業(yè) 281分,一志愿四川大學(xué),誠心求調(diào)劑 +11 | 吃吃吃才有意義 2026-03-19 | 11/550 |
|
|
[考研] 297求調(diào)劑 +11 | 戲精丹丹丹 2026-03-17 | 12/600 |
|
|
[考研] 材料學(xué)學(xué)碩080502 337求調(diào)劑-一志愿華中科技大學(xué) +4 | 順順順mr 2026-03-18 | 5/250 |
|
|
[考研] 085601調(diào)劑 358分 +3 | zzzzggh 2026-03-20 | 4/200 |
|
|
[考研] 316求調(diào)劑 +6 | 梁茜雯 2026-03-19 | 6/300 |
|
|
[考研] 265求調(diào)劑 +9 | 梁梁校校 2026-03-17 | 9/450 |
|
|
[考研] 287求調(diào)劑 +7 | 晨昏線與星海 2026-03-19 | 8/400 |
|
|
[考研] 329求調(diào)劑 +9 | 想上學(xué)吖吖 2026-03-19 | 9/450 |
|
|
[考研] 289求調(diào)劑 +6 | 懷瑾握瑜l 2026-03-20 | 6/300 |
|
|
[考研] 一志愿吉林大學(xué)材料學(xué)碩321求調(diào)劑 +11 | Ymlll 2026-03-18 | 15/750 |
|
|
[考研] 286求調(diào)劑 +6 | lemonzzn 2026-03-16 | 10/500 |
|
|
[考研] 材料專碩306英一數(shù)二 +10 | z1z2z3879 2026-03-16 | 13/650 |
|
|
[考研] 312求調(diào)劑 +8 | 陌宸希 2026-03-16 | 9/450 |
|
|
[考研] 0703化學(xué)336分求調(diào)劑 +6 | zbzihdhd 2026-03-15 | 7/350 |
|
|
[考研] 308求調(diào)劑 +4 | 是Lupa啊 2026-03-16 | 4/200 |
|
|
[考研] 275求調(diào)劑 +4 | 太陽花天天開心 2026-03-16 | 4/200 |
|
|
[考研] 一志愿,福州大學(xué)材料專碩339分求調(diào)劑 +3 | 木子momo青爭 2026-03-15 | 3/150 |
|
|
[考研] 070300化學(xué)學(xué)碩求調(diào)劑 +6 | 太想進步了0608 2026-03-16 | 6/300 |
|