Thèses sur le sujet « Banach algebras »
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Cowell, S. R. « Unitary Banach algebras ». Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636306.
Texte intégralDaws, Matthew David Peter. « Banach algebras of operators ». Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414151.
Texte intégralGourdeau, Frederic Marcel. « Amenability of Banach algebras ». Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305500.
Texte intégralHeath, Matthew J. « Bounded derivations from Banach algebras ». Thesis, University of Nottingham, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519425.
Texte intégralKnapper, Andrew. « Derivations on certain banach algebras ». Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368411.
Texte intégralFeinstein, Joel Francis. « Derivations from Banach function algebras ». Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329058.
Texte intégralYang, Hongfei. « Properties of Banach function algebras ». Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/49075/.
Texte intégralMudau, Leonard Gumani. « Zero divisors in banach algebras ». Thesis, University of Limpopo (Medunsa Campus), 2010. http://hdl.handle.net/10386/632.
Texte intégralChoi, Yemon. « Cohomology of commutative Banach algebras and l¹-semigroup algebras ». Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427291.
Texte intégralSchick, G. J. « Spectrally bounded operators on Banach algebras ». Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390862.
Texte intégralBland, William J. « Banach function algebras and their properties ». Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364660.
Texte intégralOliver, Thomas. « Extensions of endomorphisms of Banach algebras ». Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432001.
Texte intégralPourabbas, Abdolrasoul. « The cohomology of some Banach algebras ». Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318540.
Texte intégralZsák, András. « Algebras of operators on Banach spaces ». Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621830.
Texte intégralHeymann, Retha. « Fredholm theory in general Banach algebras ». Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4265.
Texte intégralENGLISH ABSTRACT: This thesis is a study of a generalisation, due to R. Harte (see [9]), of Fredholm theory in the context of bounded linear operators on Banach spaces to a theory in a Banach algebra setting. A bounded linear operator T on a Banach space X is Fredholm if it has closed range and the dimension of its kernel as well as the dimension of the quotient space X/T(X) are finite. The index of a Fredholm operator is the integer dim T−1(0)−dimX/T(X). Weyl operators are those Fredholm operators of which the index is zero. Browder operators are Fredholm operators with finite ascent and descent. Harte’s generalisation is motivated by Atkinson’s theorem, according to which a bounded linear operator on a Banach space is Fredholm if and only if its coset is invertible in the Banach algebra L(X) /K(X), where L(X) is the Banach algebra of bounded linear operators on X and K(X) the two-sided ideal of compact linear operators in L(X). By Harte’s definition, an element a of a Banach algebra A is Fredholm relative to a Banach algebra homomorphism T : A ! B if Ta is invertible in B. Furthermore, an element of the form a + b where a is invertible in A and b is in the kernel of T is called Weyl relative to T and if ab = ba as well, the element is called Browder. Harte consequently introduced spectra corresponding to the sets of Fredholm, Weyl and Browder elements, respectively. He obtained several interesting inclusion results of these sets and their spectra as well as some spectral mapping and inclusion results. We also convey a related result due to Harte which was obtained by using the exponential spectrum. We show what H. du T. Mouton and H. Raubenheimer found when they considered two homomorphisms. They also introduced Ruston and almost Ruston elements which led to an interesting result related to work by B. Aupetit. Finally, we introduce the notions of upper and lower semi-regularities – concepts due to V. M¨uller. M¨uller obtained spectral inclusion results for spectra corresponding to upper and lower semi-regularities. We could use them to recover certain spectral mapping and inclusion results obtained earlier in the thesis, and some could even be improved.
AFRIKAANSE OPSOMMING: Hierdie tesis is ‘n studie van ’n veralgemening deur R. Harte (sien [9]) van Fredholm-teorie in die konteks van begrensde lineˆere operatore op Banachruimtes tot ’n teorie in die konteks van Banach-algebras. ’n Begrensde lineˆere operator T op ’n Banach-ruimte X is Fredholm as sy waardeversameling geslote is en die dimensie van sy kern, sowel as di´e van die kwosi¨entruimte X/T(X), eindig is. Die indeks van ’n Fredholm-operator is die heelgetal dim T−1(0) − dimX/T(X). Weyl-operatore is daardie Fredholm-operatore waarvan die indeks gelyk is aan nul. Fredholm-operatore met eindige styging en daling word Browder-operatore genoem. Harte se veralgemening is gemotiveer deur Atkinson se stelling, waarvolgens ’n begrensde lineˆere operator op ’n Banach-ruimte Fredholm is as en slegs as sy neweklas inverteerbaar is in die Banach-algebra L(X) /K(X), waar L(X) die Banach-algebra van begrensde lineˆere operatore op X is en K(X) die twee-sydige ideaal van kompakte lineˆere operatore in L(X) is. Volgens Harte se definisie is ’n element a van ’n Banach-algebra A Fredholm relatief tot ’n Banach-algebrahomomorfisme T : A ! B as Ta inverteerbaar is in B. Verder word ’n Weyl-element relatief tot ’n Banach-algebrahomomorfisme T : A ! B gedefinieer as ’n element met die vorm a + b, waar a inverteerbaar in A is en b in die kern van T is. As ab = ba met a en b soos in die definisie van ’n Weyl-element, dan word die element Browder relatief tot T genoem. Harte het vervolgens spektra gedefinieer in ooreenstemming met die versamelings van Fredholm-, Weylen Browder-elemente, onderskeidelik. Hy het heelparty interessante resultate met betrekking tot insluitings van die verskillende versamelings en hulle spektra verkry, asook ’n paar spektrale-afbeeldingsresultate en spektraleinsluitingsresultate. Ons dra ook ’n verwante resultaat te danke aan Harte oor, wat verkry is deur van die eksponensi¨ele-spektrum gebruik te maak. Ons wys wat H. du T. Mouton en H. Raubenheimer verkry het deur twee homomorfismes gelyktydig te beskou. Hulle het ook Ruston- en byna Rustonelemente gedefinieer, wat tot ’n interessante resultaat, verwant aan werk van B. Aupetit, gelei het. Ten slotte stel ons nog twee begrippe bekend, naamlik ’n onder-semi-regulariteit en ’n bo-semi-regulariteit – konsepte te danke aan V. M¨uller. M¨uller het spektrale-insluitingsresultate verkry vir spektra wat ooreenstem met bo- en onder-semi-regulariteite. Ons kon dit gebruik om sekere spektrale-afbeeldingsresultate en spektrale-insluitingsresultate wat vroe¨er in hierdie tesis verkry is, te herwin, en sommige kon selfs verbeter word.
Kuo, Po Ling. « Algebras de Banach de funções continuas ». [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306891.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica
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Mestrado
Mestre em Matemática
Bertoloto, Fábio José. « Algebras de Banach de funções analiticas ». [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307335.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação
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Resumo: O principal objetivo deste trabalho é o estudo de certos espaços de Banach de funções analíticas no disco aberto unitário, conhecidos como espaços de Hardy. Um outro objetivo é o estudo das propriedades básicas de álgebras de Banach, com especial ênfase na álgebra do disco e na álgebra das funções analíticas e limitadas no disco aberto unitário
Abstract: The main objective of this work is the study of certain Banach spaces of analytic functions on the open unit disc, known as Hardy spaces. Another objective is the study of the basic properties of Banach algebras, with special emphasis in the disc algebra and the algebra of bounded analytic functions in the open unit disc
Mestrado
Matematica
Mestre em Matemática
White, Jared. « Banach algebras on groups and semigroups ». Thesis, Lancaster University, 2018. http://eprints.lancs.ac.uk/125490/.
Texte intégralOberbroeckling, Lisa A. « Generalized inverses in certain Banach algebras / ». view abstract or download file of text, 2002. http://wwwlib.umi.com/cr/uoregon/fullcit?p3055703.
Texte intégralTypescript. Includes vita and abstract. Includes bibliographical references (leaves 57-58). Also available for download via the World Wide Web; free to University of Oregon users. Address: http://wwwlib.umi.com/cr/uoregon/fullcit?p3055703.
Moore, David. « Endomorphisms of commutative unital Banach algebras ». Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39674/.
Texte intégralZhang, Yong. « Amenability and weak amenability of Banach algebras ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0004/NQ41635.pdf.
Texte intégralHowey, Richard Andrew Jonathon. « Approximately multiplicative maps between some Banach algebras ». Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324859.
Texte intégralMuzundu, Kelvin. « Spectral theory in commutatively ordered banach algebras ». Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71619.
Texte intégralWeigt, Martin. « Spectrum preserving linear mappings between Banach algebras ». Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53597.
Texte intégralENGLISH ABSTRACT: Let A and B be unital complex Banach algebras with identities 1 and I' respectively. A linear map T : A -+ B is invertibility preserving if Tx is invertible in B for every invertible x E A. We say that T is unital if Tl = I'. IfTx2 = (TX)2 for all x E A, we call T a Jordan homomorphism. We examine an unsolved problem posed by 1. Kaplansky: Let A and B be unital complex Banach algebras and T : A -+ B a unital invertibility preserving linear map. What conditions on A, Band T imply that T is a Jordan homomorphism? Partial motivation for this problem are the Gleason-Kahane-Zelazko Theorem (1968) and a result of Marcus and Purves (1959), these also being special instances of the problem. We will also look at other special cases answering Kaplansky's problem, the most important being the result stating that if A is a von Neumann algebra, B a semi-simple Banach algebra and T : A -+ B a unital bijective invertibility preserving linear map, then T is a Jordan homomorphism (B. Aupetit, 2000). For a unital complex Banach algebra A, we denote the spectrum of x E A by Sp (x, A). Let a(x, A) denote the union of Sp (x, A) and the bounded components of
Skillicorn, Richard. « Discontinuous homomorphisms from Banach algebras of operators ». Thesis, Lancaster University, 2016. http://eprints.lancs.ac.uk/79356/.
Texte intégralMorley, Sam. « Regularity and extensions of Banach function algebras ». Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/43358/.
Texte intégralZuick, Nhan H. « The Gelfand Theorem for Commutative Banach Algebras ». CSUSB ScholarWorks, 2015. https://scholarworks.lib.csusb.edu/etd/243.
Texte intégralBird, Alistair. « A study of James-Schreier spaces as Banach spaces and Banach algebras ». Thesis, Lancaster University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551626.
Texte intégralWilkins, Timothy John Digby. « Spectral characterisations in non-associative algebras ». Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243002.
Texte intégralKilgour, Christopher Edward. « Radical convolution algebras ». Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319998.
Texte intégralEsslamzadeh, Gholam Hossein. « Banach algebra structure and amenability of a class of matrix algebras with applications ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0002/NQ29033.pdf.
Texte intégralDas, Bata Krishna. « Quantum stochastic analysis in Banach space and operator space ». Thesis, Lancaster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.660115.
Texte intégralLawson, Paul David. « Ideals in Banach algebras and notions of amenability ». Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491742.
Texte intégralPinto, Dominic Luiz. « Convolution semigroups, and primes in radical Banach algebras ». Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435784.
Texte intégralBoos, Lynette J. « Function Algebras on Riemann Surfaces and Banach Spaces ». Bowling Green State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1151340555.
Texte intégralAdamo, Maria Stella. « Representable functionals and derivations on Banach quasi *-algebras ». Doctoral thesis, Università di Catania, 2019. http://hdl.handle.net/10761/4117.
Texte intégralPanova, Olga. « Real Gelfand-Mazur algebras / ». Online version, 2006. http://dspace.utlib.ee/dspace/bitstream/10062/117/1/panovaolga.pdf.
Texte intégralAli, Abdullah Khalifa Saeed. « Some topics in the theory of Banach function algebras ». Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338490.
Texte intégralPham, Hung Le. « The functions of homomorphisms and derivations from Banach algebras ». Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421451.
Texte intégralYoung, Matthew. « The structure of spectrally bounded operators on Banach algebras ». Thesis, Queen's University Belfast, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709866.
Texte intégralCushing, David. « Homological properties of Banach and C*-algebras of continuous fields ». Thesis, University of Newcastle upon Tyne, 2015. http://hdl.handle.net/10443/3024.
Texte intégralPedersen, Thomas Vils. « Banach algebras of functions on the circle and the disc ». Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338209.
Texte intégralBenjamin, Ronalda Abigail Marsha. « Continuity of Drazin and generalized Drazin inversion in Banach algebras ». Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79878.
Texte intégralFalco, Benavent Francisco Javier. « Complex approximation and fibers of Banach algebras of analytic functions ». Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1478016863252231.
Texte intégralNeale, Daniel Lloyd. « Topics in automatic continuity for banach and other complete metrizable algebras ». Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616117.
Texte intégralCho, Chong-Man d. « M-ideal structures in operator algebras / ». The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259125219421.
Texte intégralJiang, Jiaosheng. « Bounded operators without invariant subspaces on certain Banach spaces ». Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037506.
Texte intégralSantos, Elisa Regina dos 1984. « A equação de Daugavet para polinômios em espaços de Banach ». [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307318.
Texte intégralTese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica
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Resumo: O resumo poderá ser visualizado no texto completo da tese digital
Abstract: The abstract is available with the full electronic document
Doutorado
Matematica
Doutor em Matemática
Green, John James. « Uniform convergence to the spectral radius and some related properties in Banach algebras ». Thesis, University of Sheffield, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242293.
Texte intégralBeaver, Scott. « Banach algebras of integral operators, off-diagonal decay, and applications in wireless communications / ». For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
Texte intégral