Sökning: "Crossed products"

Hittade 5 avhandlingar innehållade orden Crossed products.

  1. 1. Crossed Product Structures Associated with Topological Dynamical Systems

    Författare :Christian Svensson; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; maximal abelian subalgebra; commutant; C*-algebra; dynamical system; ideal; Banach algebra; Crossed product;

    Sammanfattning : We study connections between topological dynamical systems and associated algebras of crossed product type. We derive equivalences between structural properties of a crossed product and dynamical properties of the associated system and furthermore derive qualitative results concerning the crossed product that are true regardless of the corresponding dynamical system. LÄS MER

  3. 2. Ideals and Maximal Commutative Subrings of Graded Rings

    Författare :Johan Öinert; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ideals; simple rings; maximal commutativity; Crossed products; graded rings;

    Sammanfattning : This thesis is mainly concerned with the intersection between ideals and (maximal commutative) subrings of graded rings. The motivation for this investigation originates in the theory of C*-crossed product algebras associated to topological dynamical systems, where connections between intersection properties of ideals and maximal commutativity of certain subalgebras are well-known. LÄS MER

  4. 3. The structure of epsilon-strongly group graded rings

    Författare :Daniel Lännström; Johan Öinert; Stefan Wagner; Patrik Lundström; Gene Abrams; Blekinge Tekniska Högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; group graded ring; Leavitt path algebra; partial crossedproduct; Cuntz-Pimsner ring; von Neumann regular ring; non-unital ring; Mathematics and applications; Matematik med tillämpningar;

    Sammanfattning : The development of a general theory of strongly group graded rings was initiated by Dade, Năstăsescu and Van Oystaeyen in the 1980s, and since then numerous structural results have been established.  In this thesis we develop a general theory of so-called (nearly) epsilon-strongly group graded rings which were recently introduced by Nystedt, Öinert and Pinedo and which generalize strongly group graded rings. LÄS MER

  5. 4. Remittances, Access & Adaptation: Options to Secure Rural Livelihoods in Morocco and Myanmar

    Författare :Laura Kmoch; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Income Poverty; Disaster Risk Reduction; Remittances; Local Agroecological Knowledge; Resource Frontiers; Climate Vulnerability; Sustainable Rural Livelihoods; Swidden Farming; Land System Governance; Myanmar;

    Sammanfattning : State leaders have adopted the 2030 Agenda for Sustainable Development and pledged to leave no one behind. This thesis advances knowledge for attaining these goals, through systems thinking and place-based research in the context of climate and land-change processes in Morocco and Myanmar. LÄS MER

  7. 5. Access to everyday activities in public space : views of people with dementia

    Författare :Anna Brorsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :activities of daily living;

    Sammanfattning : The general aim of this thesis was to increase knowledge about problematic situations in public space as experienced by community-dwelling people with dementia, and about how they meet these situations when doing everyday activities there. The aim also included increasing knowledge about transactions between people with dementia and public space. LÄS MER