On exponential stability of linear differential equations with several delays

New explicit conditions of exponential stability are obtained for the nonautonomous linear equation

     

Explicit exponential stability conditions for linear differential equations with several delays

New explicit conditions of exponential stability are obtained for the nonautonomous linear equation

     

On exponential dichotomy and stability of a differential system with retarded arguments

Questions concerning exponential dichotomy for systems of differential equations with delay are considered.Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 43, No. 10, pp. 1418–1429, October, 1991.     

On uniform exponential stability of linear switching system

We prove that the linear switching system , where is bounded valued square matrices and ?:[0,1,2,…)→Ω is an arbitrary switching signals, is uniformly exponentially stable if the sequence is bounded, where s(k) is bounded valued sequence.     

On exponential stability of neutral delay differential system with nonlinear uncertainties

In this paper, the exponential stability for neutral delay differential system with nonlinear uncertainties is investigated. A novel exponential stability criterion for the system is derived using generalized eigenvalue problem (GEVP) approach. Based on this approach, the maximum allowable length and convergence rate is obtained. These stability conditions are formulated as linear matrix inequalities (LMIs) which can be easily solved by various convex optimization algorithms. Numerical examples are given to illustrate the usefulness of our proposed method.     

On the exponential and polynomial stability for a linear Bresse system

In this paper, we consider a linear one-dimensional Bresse system consisting of three hyperbolic equations coupled in a certain manner under mixed homogeneous Dirichlet-Neumann boundary conditions. Here, we consider that only the longitudinal displacement is damped, and the vertical displacement and shear angle displacement are free. We prove the well-posedness of the system and some exponential, lack of exponential and polynomial stability results depending on the coefficients of the equations and the smoothness of initial data. At the end, we use some numerical approximations based on finite difference techniques to validate the theoretical results. The proof is based on the semigroup theory and a combination of the energy method and the frequency domain approach.     

Spline monotone approximation with linear differential operators

Let f∈C³[a,b] and L be a linear differential operator such that L(f)≥0. Then there exists a sequence Q_n, n≥1, of polynomial splines with equally spaced knots, such that Q^(r), approximates f^(r), 0≤r≤s, simultaneously in the uniform norm. This approximation is given through inequalities with rates, involving a measure of smoothness to f^(s); so that L (Q_n)≥0. The encountered cases are the continuous, periodic and discrete.     

Conditional stability of linear programming problems

Translated from Programmnoe Oborudovanie i Voprosy Prinyatiya Reshenii, pp. 99–105, 1989.     

Conditional stability for a class of second-order differential equations

Using two classes of test functions introduced recently by the authors, a criterion for conditional stability of the trivial solution of a second-order semi-linear differential equation is established.     

具滞后中立型线性大系统的指数稳定性

采用具有加权向量范数型李雅谱诺夫函数，对具滞后中立型线型大系统进行模型集结，得到集结系统；再运用比较原理与时域中的微分积分不等式，讨论相应集结系统，从而通过集结系统的稳定性，获得了具滞后中立型大系统的指数稳定性。     

Dual exponential polynomials and linear differential equations

We study linear differential equations with exponential polynomial coefficients, where exactly one coefficient is of order greater than all the others. The main result shows that a nontrivial exponential polynomial solution of such an equation has a certain dual relationship with the maximum order coefficient. Several examples illustrate our results and exhibit possibilities that can occur.     

Weak exponential stability of stochastic differential equations

In this paper we introduce weak exponential stability of stochastic differential equations. In particular, we introduce weak exponential stability in mean, weak exponential asymptotical stability in mean and weak uniform asymptotical stability in mean. We also derive some results related to the above concepts