Results 71 to 80 of about 603 (164)

Fredholm Properties for Pencils [PDF]

American Review of Mathematics and Statistics, 2021
openaire   +1 more source

Fredholm properties and nonlinear Dirichlet problems for mixed type operators

Journal of Mathematical Analysis and Applications, 2013
AbstractFor a class of linear partial differential operators of mixed elliptic–hyperbolic type with homogeneous Dirichlet data on the entire boundary of suitable planar domains, we exploit the recent spectral theory of Lupo et al. [2] to establish a Fredholm alternative for weak solutions of the linear Dirichlet problem.
LUPO, DANIELA ELISABETTA, MONTICELLI, DARIO DANIELE, K. R. Payne   +2 more
openaire   +4 more sources

On new strong versions of Browder type theorems

Open Mathematics, 2018
An operator T acting on a Banach space X satisfies the property (UWΠ) if σa(T)∖ σSF+−$\begin{array}{} \sigma_{SF_{+}^{-}} \end{array} $(T) = Π(T), where σa(T) is the approximate point spectrum of T, σSF+−$\begin{array}{} \sigma_{SF_{+}^{-}} \end{array} $
Sanabria José, Carpintero Carlos, Rodríguez Jorge, Rosas Ennis, García Orlando   +4 more
doaj   +1 more source

On the solvability of the scalar monochromatic wave diffraction problem on an inhomogeneous solid with specific transmission conditions

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2023
Background. The purpose of this work is to study the 3-D scalar problem of scattering a plane wave from an inhomogeneous solid covered with an infinitely thin layer of graphene. Material and methods.
Aleksey A. Tsupak
doaj   +1 more source

Hardy spaces of generalized analytic functions and composition operators

Concrete Operators, 2018
We present some recent results on Hardy spaces of generalized analytic functions on D specifying their link with the analytic Hardy spaces. Their definition can be extended to more general domains Ω . We discuss the way to extend such definitions to more
Pozzi Elodie
doaj   +1 more source

Caffeine in cerebrovascular research: To withdraw or not to withdraw?

Experimental Physiology, Volume 111, Issue 2, Page 335-339, 1 February 2026.
Brooke R. Shepley, Kevin J. Milne, Anthony Richard Bain   +2 more
wiley   +1 more source

Different types of solvability conditions for differential operators

Electronic Journal of Differential Equations, 2006
Solvability conditions for linear differential equations are usually formulated in terms of orthogonality of the right-hand side to solutions of the homogeneous adjoint equation.
Sergey G. Kryzhevich, Vitaly A. Volpert
doaj  

Solving singularly perturbed fredholm integro-differential equation using exact finite difference method. [PDF]

BMC Res Notes, 2023
Badeye SR, Woldaregay MM, Dinka TG.
europepmc   +1 more source

Solvability in the sense of sequences to some non-Fredholm operators

Electronic Journal of Differential Equations, 2013
We study the solvability of certain linear nonhomogeneous elliptic problems and show that under reasonable technical conditions the convergence in $L^2(mathbb{R}^d)$ of their right sides implies the existence and the convergence in $H^2(mathbb{R}^d ...
Vitaly Volpert, Vitali Vougalter
doaj  

A spectral theorem for a non-Archimedean valued field whose residue field is formally real

Extracta Mathematicae
In this paper, we will prove a spectral theorem for self-adjoint compactoid operators. Also, we will study the condition on which the coefficient field must be imposed.
K. Ishizuka
doaj   +1 more source