Neurofibromatoses are a group of genetic disorders with predisposing for central and peripheral nervous system tumor development. The includes three entities: neurofibromatosis type I, II schwannomatosis, which characterized by gradual phenotype development have partially overlapping spectrum manifestations, complicates diagnosis establishing, especially at the stage clinical onset. At same tim...

Abstract Equilibrium problems provide a mathematical framework which includes optimization, variational inequalities, fixed point and saddle problems, noncooperative games as particular cases. In this paper sufficient conditions for the existence of solutions an equilibrium problem are given by weakening assumption quasiconvexity involved bifunction. The is established both in presence compactn...