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1、哈爾濱理工大學(xué)碩士學(xué)位論文Banach空間中的若干幾何性質(zhì)及其應(yīng)用姓名:王立濤申請學(xué)位級別:碩士專業(yè):@指導(dǎo)教師:崔云安201103哈爾濱理工大學(xué)理學(xué)碩士學(xué)位論文Banach空間中的若干幾何性質(zhì)及其應(yīng)用摘要自從上個世紀(jì)初期,Banach提出了Banach壓縮映象原理以來,Banach壓縮原理得以普遍應(yīng)用。1965年,W.A.Kirk又證明了帶有正規(guī)結(jié)構(gòu)的Banach空間擁有弱不動點(diǎn)性質(zhì);1965年,Kadec.Klee引入了KK性質(zhì);1980年Huff引入NUC及UKK的定義,并且證明了Banach空間X是NUC當(dāng)且僅當(dāng)X是自
2、反的且具有UKK,這里UKK蘊(yùn)含KK性質(zhì);l992年D.KUTZAROVA,E.MALUTA和S.PRUS引入WUKK、WUKK。的定義;1983年D.VanDulst和B.Sims證明了WUKKjF胛,并且引入了新的定義UKK+和WUKK+。、在本篇論文中,我們主要在Banach空問x的對偶空間X‘中引入了W‘UKK-、W‘UKK(口’和W’硼X(∥)這三種新的幾何性質(zhì),并研究了這三種新的幾何性質(zhì)與不動點(diǎn)性質(zhì)之間的關(guān)系。本論文共分三部分,首先介紹了Banach空間X中的一些基本概念和基本性質(zhì),并簡單的討論了一些幾何性質(zhì)之間的
3、關(guān)系。其次,根據(jù)對Banach空間x中KK、UKK、WUKK、WUKK’性質(zhì)的討論,我們又引W+UKK’、W’明礬(口’和W‘ⅢⅨ似’’三個新的幾何性質(zhì)。最后,我們驗(yàn)證了Banach空間X的對偶空間X‘中如果有W’UKK’,W‘UKK(∞和W4UKK∽,)這三種新的幾何性質(zhì),那么就能得出Banach空間Z具有弱不動點(diǎn)性質(zhì)。關(guān)鍵詞W+UKK’性質(zhì);W’UKK‘叭l生質(zhì);礦‘UKK‘∥’性質(zhì);不動點(diǎn)性質(zhì)哈爾濱理T大學(xué)理學(xué)碩I:學(xué)位論文SomeGeometricPropertiesandApplicationinBanachSpac
4、eAbstractSinceearlylastcentury,BanachcontractionmappingprincipleispresentedbyBanach,ithasbeenwidelyapplicationsinmanyfields.In1965,W.A.KirkhadprovedthepropertythatBanaehspacewiththenormalstructurehagtheweakfixedpointproperty.In1965,KKpropertieswasintroducedbyKadee.K
5、leeandthedefinitionofnearlyuniformlyconvexandUniformKadec.KleepropertywereintreducedbyHuffin1980,theyhadgotthataBanachspaceisNUCifandonlyifitiSreflexiveandithas(UKK),andaBanachspacewith(UKK)has(KK)property.In1992,thedefinitionofWUKKandWUKK’hadbeenintroducedbyD.KUTZA
6、ROVA,E.MALUTA&S.PRUS.a(chǎn)ndWUKKimpliesFPPhadbeenprovedbyD。VanDulstandB.Sims.a(chǎn)ndthenewdefinitionof懈’and矽嗽’hadbeenintroducedin1983.Inthispaper,threenewgeometricproperties,namelyW+UKK’propertiesandW‘UKK(口)andW。UKK‘∥)inthedualspaceX+ofBanachspaceX.a(chǎn)rcintroduced.Moreover'th
7、erelationshipsofthreenewgeometricpropertiesandfixedpointpropertyarestudied.ThethesisiSdevidedintothreeparts.Firstofa11.somebasicconceptsandbasicpropertiesofBanachspaceareintroduced.Andtherelationshipofsomegeometricpropertiesisshown.Second,accordingtothediscussionofK
8、KpropertiesandUKKpropertiesandWUKKpropertiesandWUKK。properties,threenewgeometricpropertiesthatW’UKK’propertiesandW‘UKK(口)andW‘明玨:(口7)inthe