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Abstract Asmaa Moustafa Aly Soliman. New Existence Theorems for Differential Inclusions and Some Topological Properties of the Set of Solutions. Doctor of Philosophy Dissertation of Pure Mathematics, University Collage for Women, Ain Shams University. The interest in set-valued differential equations was revived in the early sixties from the 20th century, when mathematicians become attracted to a new domain: Control theory. Indeed many control systems can be modeled by a differential inclusion. So, many forms of differential inclusions were investigated and theorems of solutions for first and second order differential inclusions were studied extensively in many papers in the literature (see e.g. [3], [13], [15], [18-22]). The aim of this thesis is to investigate new existence theorems for different types of differential inclusions and to study the topological properties of the set of solutions. This work is divided into five chapters: In chapter one, of this thesis, we gathered definitions and some known new facts about the properties of set-valued functions, differential inclusions and functional differential inclusions. In chapter two, we define the fractional Pettis and Aumann-Pettis integral for multifunctions, we study some properties of the integrals and we study the relation between the integrals. In chapter three, we define the fractional Kurzweil-Henstock-Pettis and Aumann- Kurzweil-Henstock-Pettis integral for multifunctions, we study some properties of the integrals and we study the relation between the integrals. In chapter four, we give an existence theorem for nonconvex semilinear functional evolution inclusion and we study some topological properties of its solution set. In chapter five, we give an existence theorem for semilinear functional differential inclusion in the case when the kernel is not necessarily compact and we study some topological properties of its solution set. Key Words: set-valued maps, differential inclusions, functional differential inclusions, existence theorems. |