Rozwiązywanie zadań dynamicznych w obszarach nieograniczonych

In numerical solutions of dynamical problems in unbounded regions the presence of typical boundaries introduces reflections. It is very important to be able to eliminate these reflections and to simulate an infinite region. Some new techniques are presented in the paper. One of them solves the problem by adding together the solutions of Dirichlet and Neumann problems. Dynamical and absorbing boundary conditions, which can be used in space-time finite elements, are also introduced.