Equadiff IV

Invariant sets for semilinear parabolic and elliptic systems.- On the numerical solution of nonlinear partial differential equations on divergence form.- Application of the averaging method for the solution of boundary problems for ordinary differential and integro-differential equations.- Solution set properties for some nonlinear parabolic differential equations.- Asymptotic invariant sets of autonomous differential equations.- Algebraic methods in the theory of global properties of the oscillatory equations Y?=Q(t)Y.- Stability problems in mathematical theory of viscoelasticity.- On the branching of solutions and Signorini's perturbation procedure in elasticity.- Differential subspaces associated with pairs of ordinary differential operators.- Control and the Van der Pol equation.- On properties of spectral approximations.- Singular perturbations and linear feedback control.- On some inverse problems for partial differential equations.- Nonlinear noncoercive boundary value problems.- On the iterative solution of some nonlinear evolution equations.- Exponential representation of solutions of ordinary differential equations.- The Rayleigh and Van der Pol wave equations, some generalizations.- The Dirichlet problem.- Multiple solutions of some asymptotically linear elliptic boundary value problems.- Dual finite element analysis for some unilateral boundary value problems.- Gradient alternating-direction methods.- Nonlinear parabolic boundary value problems with the time derivative in the boundary conditions.- Variational and boundary value problems for differential equations with deviating argument.- On a general conception of duality in optimal control.- Boundary value problems for systems of nonlinear differential equations.- Boundary behavior of potentials.- Some modifications of sobolev spaces and non-linear boundary value problems.- Some problems in neutron transport theory.- On formulation and solvability of boundary value problems for viscous incompressible