I am a postgraduate, and my major is' Finite-Dimensional Variational Inequalities and Complementarity Problems'.

This system is globally approximately controllable and finite-dimensional exactly controllable when the eigenvalues, eigenfunctions and the points which support the controls satisfy some assumptions.

This paper deals with asymptotic behaviour of finite-dimensional contact elements of infinite-dimensional linear systems. In particular. the analytical expression of the asymptotic solutions is given.