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Journal of Convex Analysis 16 (2009), No. 3, 899--911 Copyright Heldermann Verlag 2009 On Existence Theorems for Monotone and Nonmonotone Variational Inequalities Antonino Maugeri Dip. di Matematica e Informatica, Università di Catania, Viale A. Doria 6-I, 95125 Catania, Italy maugeri@dmi.unict.it Fabio Raciti Dip. di Matematica e Informatica, Università di Catania, Viale A. Doria 6-I, 95125 Catania, Italy fraciti@dmi.unict.it We make a comparison among various existence theorems for monotone and nonmonotone variational inequalities and give necessary conditions for the solvability of the variational inequality problem. Keywords: Brezis-pseudomonotonicity, Karamardian-pseudomonotonicity, Fan-hemicontinuity, hemicontinuity along line segments, coercivity. MSC: 47H05, 52A41,39B82 [ Fulltext-pdf (132 KB)] for subscribers only. |