Exceptional Family of Elements for a Variational Inequality Problem and its Applications

  • Authors:
  • Y. B. Zhao;J. Han

  • Affiliations:
  • Institute of Applied Mathematics, Chinese Academy of Sciences, P.O. Box 2734, Beijing, 100080, People‘s Republic of China (e-mail: zyb@lsec.cc.ac.cn);Institute of Applied Mathematics, Chinese Academy of Sciences, P.O. Box 2734, Beijing, 100080, People‘s Republic of China (e-mail: zyb@lsec.cc.ac.cn)

  • Venue:
  • Journal of Global Optimization
  • Year:
  • 1999

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Abstract

This paper introduces a new concept of exceptional family of elements (abbreviated, exceptional family) for a finite-dimensional nonlinear variational inequality problem. By using this new concept, we establish a general sufficient condition for the existence of a solution to the problem. Such a condition is used to develop several new existence theorems. Among other things, a sufficient and necessary condition for the solvability of pseudo-monotone variational inequality problem is proved. The notion of coercivity of a function and related classical existence theorems for variational inequality are also generalized. Finally, a solution condition for a class of nonlinear complementarity problems with so-called P_*-mappings is also obtained.