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Lower semicontinuous differential inclusions

Tzanko Donchev — 1998

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

In the paper we consider lower semicontinuous differential inclusions with one sided Lipschitz and compact valued right hand side in a Banach space with uniformly convex dual. We examine the nonemptiness and some qualitative properties of the solution set.

Lower semicontinuous differential inclusions. One-sided Lipschitz approach

Tzanko Donchev — 1998

Colloquium Mathematicae

Some properties of differential inclusions with lower semicontinuous right-hand side are considered. Our essential assumption is the one-sided Lipschitz condition introduced in [4]. Using the main idea of [10], we extend the well known relaxation theorem, stating that the solution set of the original problem is dense in the solution set of the relaxed one, under assumptions essentially weaker than those in the literature. Applications in optimal control are given.

Mixed type semicontinuous differential inclusions in Banach spaces

Tzanko Donchev — 2001

Annales Polonici Mathematici

We consider a class of differential inclusions in (nonseparable) Banach spaces satisfying mixed type semicontinuity hypotheses and prove the existence of solutions for a problem with state constraints. The cases of dissipative type conditions and with time lag are also studied. These results are then applied to control systems.

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