Functional Analysis and Operator Theory -

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Résumé :
From the Contents: A. Lambert: Weighted shifts and composition operators on L2; - A.S.Cavaretta/A.Sharma: Variation diminishing properties and convexityfor the tensor product Bernstein operator; - B.P. Duggal: A note on generalised commutativity theorems in the Schatten norm; - B.S.Yadav/D.Singh/S.Agrawal: De Branges Modules in H2(Ck) of the torus; - D. Sarason: Weak compactness of holomorphic composition operators on H1; - H.Helson/J.E.McCarthy: Continuity of seminorms; - J.A. Siddiqui: Maximal ideals in local Carleman algebras; - J.G. Klunie: Convergence of polynomials with restricted zeros; - J.P. Kahane: On a theorem of Polya; - U.N. Singh: The Carleman-Fourier transform and its applications; - W. Zelasko: Extending seminorms in locally pseudoconvex algebras;

Sommaire:
A qualitative uncertainity principle for hypergroups.- Weighted shifts and composition operators on L2.- Variation diminishing properties and convexity for the tensor product Bernstein operator.- Approximation in weighted Banach spaces of power series.- A note on generalised commutativity theorems in the Schatten norm.- De branges modules in H2(?K) of the torus.- Weak compactness of holomorphic composition operators on H 1.- Nonexpansive mappings and proximinality in normed almost linear spaces.- Continuity of seminorms.- Maximal ideals in local Carleman algebras.- Convergence of polynomials with restricted zeros.- On a theorem of P?lya.- Algebra direct sum decomposition of CR(X).- Exposed points and points of continuity in closed bounded convex sets.- Boundedly complete bases in various locally convex Spaces.- A representation of the multipler module homA(A,W).- On two-parameter semigroup of operators.- Higher Fr?chet and discrete G?teaux differenttiability of n-convex functions on Banach spaces.- Role of James like spaces in multiplicative linear functionals on operator algebras.- The Carleman-Fourier transform and its applications.- Extending seminorms in locally pseudoconvex algebras.