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4.749  Articles
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The object of this study is the Friedrichs model in the case of one-dimensional perturbation of the multiplication operator by an independent variable. One of the most problematic places in this theory is when the number of eigenvalues is infinite. Theref... see more

The object of this study is the Friedrichs model in the case of one-dimensional perturbation of the multiplication operator by an independent variable. One of the most problematic places in this theory is when the number of eigenvalues is infinite. Theref... see more

In this paper we characterize continuity and compactness of composition operators Cfmapping the a-Bloch space into the µ-Bloch space, where µ is a weight defined on the unit disk D, in term of certain expression that involve the n-power of the symbol f.

This work concerns the study of the approximate controllability for some nonlinear partial functional integrodifferential equation with infinite delay arising in the modelling of materials with memory, in the framework of Hilbert spaces. We give suff... see more

In this work, we study the existence and uniqueness of mild and classical solutions for a nonlinear impulsive partial integrodiifential equation with nonlocal conditions. We need the compactness of the resolvent operator of the integrodifferential equatio... see more

In this work, we prove the existence of solutions for a tripled systemof integral equations using some new results of fixed point theory associated withmeasure of noncompactness. These results extend the results in some previousworks. Also, the condition ... see more

Convergence proofs are given for the projection based boundary element methods for the numerical solution of various Fourier problems in regions with smooth compact boundaries. Volterra integral equations of the 2nd kind are formulated with associated int... see more

This work concerns the study of the approximate controllability for some nonlinear partial functional integrodifferential equation with infinite delay arising in the modelling of materials with memory, in the framework of Hilbert spaces. We give suff... see more

We study here Dirichlet boundary value problem for a quasi-linear elliptic equation with anisotropic p-Laplace operator in its principle part and L^1-control in coefficient of the low-order term. As characteristic feature of such problem  is a specif... see more

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