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Träfflista för sökning "AMNE:(NATURAL SCIENCES) AMNE:(Mathematics) AMNE:(Mathematical Analysis) srt2:(1990-1999)"

Sökning: AMNE:(NATURAL SCIENCES) AMNE:(Mathematics) AMNE:(Mathematical Analysis) > (1990-1999)

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2.
  • Fällström, Anders, et al. (författare)
  • Counterexamples to the Gleason Problem
  • 1998
  • Ingår i: Ann. Scuola Norm. Sup. Pisa. Cl. Sci. (4). ; XXVI, s. 595-603
  • Tidskriftsartikel (refereegranskat)
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3.
  • Fällström, Anders (författare)
  • Maximal idels in A(Omega)
  • 1999
  • Ingår i: Conemporary Mathematics. ; 222, s. 173-179
  • Tidskriftsartikel (refereegranskat)
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8.
  • Holmbom, Anders (författare)
  • Some modes of convergence and their application to homogenization and optimal composites design
  • 1996
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • In this thesis, we develop, extend, apply, and discuss a number of methods for the study of limits of sequences of functions and operators. The connection between the notion of two-scale convergence and more general concepts of convergence is investigated and some alternative classes of admissible test functions are characterized. These techniques are extended into compactness results suitable to prove homogenization and corrector results for linear parabolic equations. A further refinement of these methods, together with a characterization of the limits of certain sequences of parameter-dependent functions which has been subject to extension from a quite general class of periodic domains, is introduced. This provides an efficient tool for the homogenization of e.g. nonlinear evolution heat conduction in heterogeneous materials which vibrate with high frequencies or are perforated by periodically arranged nonconducting holes. Moreover, we prove compactness and homogenization for sequences of solutions of linear elliptic and monotone parabolic equations defined in some classes of nonperiodic domains and derive a Darcy's law for a type of nonperiodic porous media. In the linear elliptic case the convergence is strengthened by means of correctors. Finally, we present some numerical results for homogenized stiffness of fibre composites and demonstrate how homogenization techniques for elasticity in composite materials and for liquid flow in porous media can be combined with recent optimization techniques to obtain optimal layout of composite materials.
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9.
  • Klisinska, Anna (författare)
  • Clarkson type inequalities and geometric properties of banach spaces
  • 1999
  • Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • In this thesis Clarkson's inequalities and their generalizations are the main tools. The technique that can be used to prove Clarkson type inequalities in more dimensions is shown. We also establish Clarkson type inequalities in general Banach spaces and point out the connections between Clarkson's inequalities and the concept of type and cotype. The classical results on the von Neumann-Jordan constant, closely related to Clarkson's inequalities, are shortly presented. The concepts of moduli of convexity and smoothness, which are connected with the geometry of Banach spaces, are discussed. Some equivalent ways of describing modulus of convexity and some properties of this function are formulated. The estimation of the modulus of convexity for L(p)-spaces is presented as well. Finally, several examples of moduli of convexity and smoothness for different spaces are described.
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