Duality mapping and the existence of periodic solutions for non-autonomous second order systems.
Noncoercive hemivariational inequality and its applications in nonconvex unilateral mechanics
This paper is devoted to the study of a class of hemivariational inequalities which was introduced by P. D. Panagiotopoulos [31] and later by Z. Naniewicz [22]. These variational formulations are natural nonconvex generalizations [15–17], [22–33] of the well-known variational inequalities. Several existence results are proved in [15]. In this paper, we are concerned with some related results and several applications.
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