Operators, Systems and Linear Algebra

On the Approximation of Hankel Matrices.- The Reduction of Multiplicity in Systems Modeling.- A Rational Flow for the Toda Lattice Equations.- On Output-Stabilizability and Detectability of Discrete-Time LQ-Optimal Control Systems.- Matrix Pairs and 2D Systems Analysis.- Spectral Minimality of J-Positive Linear Systems of Finite Order.- State Feedback in General Discrete-Time Systems.- Nonblocking Supervisory Control of Nondeterministic Systems.- Noncommutative Power Series and Formal Lie-Algebraic Techniques in Nonlinear Control Theory.- Recent Progress on the Partial Stochastic Realization Problem.- Generalized Partial Realizations.- Oblique Splitting Subspaces and Stochastic Realization with Inputs.- Lyapunov Revisited: Variations on a Matrix Theme.- Linear Systems and Discontinuous Dynamics.- Differential Invariants and Curvature Flows in Active Vision.- On the Convergence of the Newton Iteration for Spectral Factorization.