A derivative array approach for linear second order differential-algebraic systems.
A Massera type criterion for a partial neutral functional differential equation.
A monotone iterative method for boundary value problems of parametric differential equations.
A new Green function concept for fourth-order differential equations.
A note on numerically consistent initial values for high index differential-algebraic equations.
A note on some characterization of invariant zeros in singular systems and algebraic criteria of nondegeneracy
The question how the classical definition of the Smith zeros of an LTI continuous-time singular control system can be generalized and related to state-space methods is discussed. The zeros are defined as those complex numbers for which there exists a zero direction with a nonzero state-zero direction. Such a definition allows an infinite number of zeros (then the system is called degenerate). A sufficient and necessary condition for nondegeneracy is formulated. Moreover, some characterization of...
A panorama of geometrical optimal control theory.
A variational approach to implicit ODEs and differential inclusions
An alternative approach for the analysis and the numerical approximation of ODEs, using a variational framework, is presented. It is based on the natural and elementary idea of minimizing the residual of the differential equation measured in a usual Lp norm. Typical existence results for Cauchy problems can thus be recovered, and finer sets of assumptions for existence are made explicit. We treat, in particular, the cases of an explicit ODE and a differential inclusion. This approach also allows...
Almost periodic solutions to second order neutral differential equations.
An Algebraic Approach to Implicit Evolution Equations
A Banach algebra homomorphism on the convolution algebra of integrable functions is the essence of Kisyński's equivalent formulation of the Hille-Yosida theorem for analytic semigroups. For the study of implicit evolution equations the notion of empathy happens to be more appropriate than that of semigroup. This approach is based upon the intertwining of two families of evolution operators and two families of pseudo-resolvents. In this paper we show that the Kisyński approach can be adapted to empathy...
An algorithm for model reduction in large electric power systems.
An oriented coincidence index for nonlinear Fredholm inclusions with nonconvex-valued perturbations.
Application of matrix polynomials to investigation of singular equations.