J. Korean Math. Soc. 2012; 49(5): 881-891
Printed September 1, 2012
https://doi.org/10.4134/JKMS.2012.49.5.881
Copyright © The Korean Mathematical Society.
Jong Yeoul Park, Jin-Mun Jeong, and Hyun-Hee Rho
Pusan National University, Pukyong National University, Pukyong National University
In this paper we investigate the approximate controllability for the following nonlinear functional differential control problem: $$ x'(t)+Ax(t)+ \partial \phi (x(t)) \ni f(t,x(t))+h(t) $$ which is governed by the variational inequality problem with nonlinear terms.
Keywords: approximate controllability, variational inequality, subdifferential operator, degree theory
MSC numbers: Primary 49J40, 93C20
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