Topological structure of solution sets for control problems governed by semilinear fractional impulsive evolution equations with nonlocal conditions
2020 ◽
Vol 37
(4)
◽
pp. 1089-1113
Keyword(s):
Abstract This article investigates the topological structural of the mild solution set for a control problem monitored by semilinear fractional impulsive evolution equations with nonlocal conditions. The $R_{\delta }$-property of the mild solution set is obtained by applying the measure of noncompactness and a fixed point theorem of condensing maps and a fixed point theorem of nonconvex valued maps. Then this result is applied to prove that the presented control problem has a reachable invariant set under nonlinear perturbations. The obtained results are also applied to characterize the approximate controllability of the presented control problem.