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# Article

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Keywords:
bifurcation; periodic solutions; variational inequality; differential inequality; finite dimensional space
Summary:
A bifurcation problem for variational inequalities $U(t) \in K, (\dot{U}(t)-B_\lambda U(t) - G(\lambda ,U(t)),\ Z - U(t))\ge 0\ \text{for} \text{all} \ Z\in K, \text{a.a.} \ t \ge 0$ is studied, where $K$ is a closed convex cone in $\mathbb{R}^\kappa$, $\kappa \ge 3$, $B_\lambda$ is a $\kappa \times \kappa$ matrix, $G$ is a small perturbation, $\lambda$ a real parameter. The main goal of the paper is to simplify the assumptions of the abstract results concerning the existence of a bifurcation of periodic solutions developed in the previous paper and to give examples in more than three dimensional case.
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