We survey recent and also older results on nonsymmetric matrix Riccati differential equations and in the time invariant case on the corresponding algebraic Riccati equations. In particular we citeâ€¦ (More)

We prove a comparison theorem for the solutions of a rational matrix difference equation, generalizing the Riccati difference equation, and existence and convergence results for the solutions of thisâ€¦ (More)

In this paper we consider the periodic Riccati differential equation (PRDE) X = A*(t)X - XA(t) - Q(t) + XS(t)X (PRDE) where A, Q and S are nÃ—n piecewise continuous, bounded matrix functions of periodâ€¦ (More)

We present two different methods to obtain global existence results for solutions of nonsymmetric Riccati matrix differential equations. In the first approach we derive sufficient conditions ensuringâ€¦ (More)

Parents who have a child suffering from atopic dermatitis usually have to deal with a lot of problems. They seldom find support in coping with this problem. If families are left alone with theseâ€¦ (More)