Geodesic
Variational Principles for Monotone and Maximal Bifunctions
Serdica Mathematical Journal, Tome 29 (2003) no. 2, pp. 159-166.

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We establish variational principles for monotone and maximal bifunctions of Brøndsted-Rockafellar type by using our characterization of bifunction’s maximality in reflexive Banach spaces. As applications, we give an existence result of saddle point for convex-concave function and solve an approximate inclusion governed by a maximal monotone operator.
Keywords: Brøndsted-Rockafellar Principle, Equilibrium Problem 
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Chbani, Zaki; Riahi, Hassan. Variational Principles for Monotone and Maximal Bifunctions. Serdica Mathematical Journal, Tome 29 (2003) no. 2, pp. 159-166. http://geodesic.mathdoc.fr/item/SMJ2_2003_29_2_a4/