Existence of solutions for wave-type hemivariational inequalities with noncoercive viscosity damping

In this paper we prove the existence of solutions for a hyperbolic hemivariational inequality of the form u + Au + Bu + ∂j (u) f, where B is a linear elliptic operator and A is linear and nonnegative (not necessarily coercive).  2002 Elsevier Science (USA). All rights reserved