Spectral properties of a differential system

On the Spectral Properties of Degenerate Non-selfadjoint Elliptic systems of Differential Operators

The spectral properties of differential operators with matrix coefficients on elliptic systems with boundary conditions

Let $$(Lv)(t)=sum^{n} _{i,j=1} (-1)^{j} d_{j} left( s^{2alpha}(t) b_{ij}(t) mu(t) d_{i}v(t)right),$$ be a non-selfadjoint differential operator on the Hilbert space $L_{2}(Omega)$ with Dirichlet-type boundary conditions. In continuing of papers [10-12], let the conditions made on the operator $ L$ be sufficiently more general than [11] and [12] as defined in Section $1$. In this paper, we estim...

Spectral properties of non-local differential operators

In this article we consider the spectral properties of a class of non-local operators that arise from the study of non-local reaction-diffusion equations. Such equations are used to model a variety of physical and biological systems with examples ranging from Ohmic heating to population dynamics. The operators studied here are bounded perturbations of linear (local) differential operators. The ...

a study on construction of iranian life tables: the case study of modified brass logit system

چکیده ندارد.

Spectral properties of a type of integro-differential stiff problems

We consider an integro-differential stiff problem, which can be used as a model for the vibrations of a body with hnear viscoelasticity at large times First, the problem is introduced in the framework of the theory of semigroups in Hubert spaces and then, an asymptotic expansion ofihe solution is obtained Fwally, it is shown the double convergence, when e —• 0 + , ofthe eigenvalues of the probl...