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Showing 1-9 of 9 results

  2. Norm resolvent convergence of Dirichlet Laplacian in unbounded thin waveguides

    The proof of norm resolvent convergence of Dirichlet Laplacian to effective operators, as the diameter of spatial waveguides vanishes, is extended to...

    César R. de Oliveira, Alessandra A. Verri in Bulletin of the Brazilian Mathematical Society, New Series
    Article 21 March 2015

  3. Relative Convergence Estimates for the Spectral Asymptotic in the Large Coupling Limit

    We prove optimal convergence estimates for eigenvalues and eigenvectors of a class of singular/stiff perturbed problems. Our profs are constructive...

    Luka Grubišić in Integral Equations and Operator Theory
    Article 01 September 2009

  4. On Pseudo-Hermitian Operators with Generalized C-symmetries

    The concept of C-symmetries for pseudo-Hermitian Hamiltonians is studied in the Krein space framework. A generalization of C-symmetries is suggested.
    S. Kuzhel in Modern Analysis and Applications
    Chapter 2009

  6. Stability Properties of Feynman's Operational Calculus for Exponential Functions of Noncommuting Operators

    Stability properties of Feynman's operational calculus are addressed in the setting of exponential functions of noncommuting operators. Applications...

    Lance Nielsen in Acta Applicandae Mathematica
    Article 01 December 2002

  7. On the One Dimensional Behaviour of Atoms in Intense Homogeneous Magnetic Fields

    We show that the Hamiltonian of an atomic ion with N bosonic electrons which is submitted to an homogeneous magnetic field and when appropriately...
    R. Brummelhuis, P. Duclos in Partial Differential Equations and Spectral Theory
    Conference paper 2001

  8. Rank one perturbations of not semibounded operators

    Rank one perturbations of selfadjoint operators which are not necessarily semibounded are studied in the present paper. It is proven that such...

    S. Albeverio, P. Kurasov in Integral Equations and Operator Theory
    Article 01 December 1997

  9. P

    Michiel Hazewinkel in Encyclopaedia of Mathematics
    Chapter 1995
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