It is known that the spectral factorization mapping is bounded, but not continuous, on Lâˆž, the space of essentially bounded measurable functions on the unit circle. In this article we study theâ€¦ (More)

This paper analyzes the BIBO stability of fractional exponential delay systems which are of retarded or neutral type. Conditions ensuring stability are given first. As is the case for the classicalâ€¦ (More)

This paper analyzes several properties linked to the robust control of fractional diier-ential systems with delays. The BIBO stability of both retarded and neutral fractional delay systems isâ€¦ (More)

We consider approximation of L 1 functions by H 1 functions on proper subsets of the circle. We derive some properties of traces of Hardy classes on such subsets, and then turn to a generalization ofâ€¦ (More)

We consider in this paper the simultaneous problem of optimal robust stabilization and optimal tracking for SISO systems in an L 1-setting using a two-parameter compensator scheme. Optimal robustnessâ€¦ (More)