Unbeschränkte Randwerte bei parabolischen Differentialgleichungen.
Une méthode intégrale de frontière. Application au Laplacien et à l'élasticité.
The aim of the paper is to give a method to solve boundary value problems associated to the Helmholtz equation and to the operator of elasticity. We transform these problems in problems on the boundary Gamma of an open set of R3. After introducing a symplectic form on H1,2(G) x H-1,2(G) we obtain the adjoint of the boundary operator employed. Then the boundary problem has a solution if and only if the boundary conditions are orthogonal, for this bilinear form, to the elements of the kernel, in a...
Uniform in time description for weak solutions of the Hopf equation with nonconvex nonlinearity.
Uniqueness and approximation of Solutions of first order non linear equations.
Uniqueness for positive solutions of -Laplacian problem in an annulus