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PrefaceSome Extensions of Topological Degree Theory with Applications to Nonlinear Problems, J. Berkovits, University of Oulu, FinlandSome Remarks on the Antimaximum Principle, J.-P. Gossez, University of BrusselsThe Fibering Method in Nonlinear Variational Problems, S.I. Pohozaev, Steklov Mathematical Institute of the Russian Academy of SciencesIndex Theories for Indefinite Functionals and Applications, A. Szulkin, University of StockholmTopological Characteristics of Fully Nonlinear Parabolic Problems, I.V. Skrypnik, Institute of Applied Mathematics and Mechanics, Ukrainian Academy of Sciences