Approximate Controllability for Stochastic Fractional Hemivariational Inequalities of Degenerate Type.

This paper is mainly concerned with stochastic fractional hemivariational inequalities of degenerate (or Sobolev) type in Caputo and Riemann-Liouville derivatives with order (1, 2), respectively. Based upon some properties of fractional resolvent family and generalized directional derivative of a locally Lipschitz function, some sufficient conditions are established for the existence and approximate controllability of the aforementioned systems. Particularly, the uniform boundedness for some nonlinear terms, the existence and compactness of certain inverse operator are not necessarily needed in obtained approximate controllability results. MSC 2010: Primary 93B05; Secondary 34A08, 93E03 [ABSTRACT FROM AUTHOR]