Статья: THE KANTOROVICH PROJECTION METHOD IN THE GENERALIZED QUADRATIC SPECTRUM APPROXIMATION

The objective of this paper is to construct a generalized quadratic spectrum approximation based on the Kantorovich projection method which llows us to deal with the spectral pollution problem. For this purpose, we prove that the property U (see Eq. 3) holds under weaker conditions than the norm and the collectively compact convergence. Numerical results illustrate the effectiveness and the convergence of our method.