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.
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Zhao, Y., Han, J. Exceptional Family of Elements for a Variational Inequality Problem and its Applications. Journal of Global Optimization 14, 313–330 (1999). https://doi.org/10.1023/A:1008202323884
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DOI: https://doi.org/10.1023/A:1008202323884