Contents -- Preface -- Contributors -- Symmetry and Nonsymmetry in Some Overdetermined Boundary Value Problems /Giovanni Alessandrini and R. Magnanini -- Asymptotical Behavior of Solutions of Some Reaction-Diffusion Systems /Marie-Franroise Bidaut-Veron -- Nonlinear Singular Parabolic Equations /Piotr Biler, Tadeusz Nadzieja and Andrzej Raczynski -- Nonlinear Liouville Theorems / /sabeau Birindelli -- Existence and Regularity Results for Quasilinear Parabolic Equations /Lucio Boccardo -- Elliptic Systems with Various Growth /Lucio Boccardo, Jacqueline Fleckinger-Pelle, and Franrois de Thelin -- Some Uniqueness Results for Liu + f(u) = 0 in RN, N ???? 3 /Carmen Cortazar, Manuel Elgueta, and Patricio Fe /mer -- A Strong Comparison Principle for the Dirichlet p-Laplacian /Mabel Cuesta and Peter Takat -- Geometric Properties of Solutions to Subelliptic Equations in Nilpotent Lie Groups /Donatella Danielli and Nicola Garofalo -- Recent Progress on Super-Diffusive Nonlinear Parabolic Problems /Panagiota Daskalopoulos and Manuel A. de[ Pino -- On Linear Perturbations of Superquadratic Elliptic Systems /Djairo G. de Figueiredo and M. Ramos -- An Age Dependent Regularization of Martin's Problem /William E. Fitzgibbon, J.J. Morgan, M. E. Parrott and G. F. Webb -- Uniqueness and Positivity for Solutions of Equations with the p-Laplacian /Jacqueline Fleckinger-Pelle, Jesus Hernandez, Peter Takat, and Franrois de Thelin -- On the First Curve in the Fucik Spectrum of a Mixed Problem /Jean-Pierre Gossez and A. Marcos -- The Maximum Principle and Positive Principal Eigenfunctions for Polyharmonic Equations /Hans-Christoph Grunau and Guido Sweers -- Positive Solutions for the Logistic Equation with Unbounded Weights /Jesus Hernandez -- Recent Results on Selfsimilar Solutions of Degenerate Nonlinear Diffusion Equations /Josephus Hulshof -- Optimal L 00 and Schauder Estimates for Elliptic and Parabolic Operators with Unbounded Coefficients /Alessandra Lunardi and Vincenza Vespri -- The Quasi-Isothermal Limit in Porous Catalysts /Francisco 1. Mancebo and Jose M. Vega -- On the Reaction-Diffusion Electrolysis Nonlinear Elliptic Equations /Stanis /av Pohozaev -- Existence of Nonnegative Solutions for Generalized p-Laplacians /Humberto Prado and Pedro Ubilla -- Stability and Blow-Up for Dissipative Evolution Equations /Patrizia Pucci and James Serrin -- A Nonlinear Schrodinger Equation Defined on the Whole Space /Ian Schindler -- Asymptotic Behavior for Large Time of Solutions of Nonlinear Evolution Equations with Dissipation /Ilia A. Shishmarev -- Hardy's Inequality for the Stokes Problem /Pavel E. Sobolevskii -- Semilinear Biharmonic Problems on RN /Nikos Stavrakakis -- Magnetic Field Wave Equations for TM-Modes in Nonlinear Optical Waveguides /Charles Stuart -- On the Behavior of Positive Solutions for a Class of Semilinear Elliptic Systems /Cecilia Yarur.