129 citations · 186 across the 7 of their papers we have counts for
7 papers
Finite determination of accessibility and geometric structure of singular points for nonlinear systems
Mohammad Amin Sarafrazi, Ülle Kotta, Zbigniew Bartosiewicz
Exploiting tools from algebraic geometry, the problem of finiteness of determination of accessibility/strong accessibility is investigated for polynomial systems and also for analy…
On the finiteness of accessibility test for nonlinear discrete-time systems
Mohammad Amin Sarafrazi, Ewa Pawluszewicz, Zbigniew Bartosiewicz +1
It is shown that for two large subclasses of discrete-time nonlinear systems - analytic systems defined on a compact state space and rational systems - the minimum length for…
Stability and stabilization of linear positive systems on time scales
ZbigniewBartosiewicz
It is shown that a positive linear system on a time scale with a bounded graininess is uniformly exponentially stable if and only if the characteristic polynomial of the matrix def…
Linear positive control systems on time scales. Controllability
Zbigniew Bartosiewicz
Positive linear systems on arbitrary time scales are studied. The theory developed in the paper unifies and extends concepts and results known for continuous-time and discrete-time…
The Second Euler-Lagrange Equation of Variational Calculus on Time Scales
Zbigniew Bartosiewicz, Natalia Martins, Delfim F. M. Torres
The fundamental problem of the calculus of variations on time scales concerns the minimization of a delta-integral over all trajectories satisfying given boundary conditions. In th…
Noether's Theorem on Time Scales
Zbigniew Bartosiewicz, Delfim F. M. Torres
We show that for any variational symmetry of the problem of the calculus of variations on time scales there exists a conserved quantity along the respective Euler-Lagrange extremal…