Geodesic
Covariant and contrvariant homomorphisms of games with preference relations
Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 9 (2009) no. 3, pp. 66-70 Cet article a éte moissonné depuis la source Math-Net.Ru

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We consider Nash equilibrium and some its modifications as principles of optimality for games with preference relations. For description of the optimal solutions of gameswith preference relations covariantly and contrvariantly complete families of homomorphisms are introduced. 
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T. F. Savina. Covariant and contrvariant homomorphisms of games with preference relations. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 9 (2009) no. 3, pp. 66-70. http://geodesic.mathdoc.fr/item/ISU_2009_9_3_a11/

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