NAME: Evangelos K. Ifantis
IMMIGRATION STATUS: Greece permanent resident.
MAILING ADDRESS: Department of Mathematics, University of Patras, Patras, Greece 26500.
CURRENT POSITION: Emeritus Professor, section of Applied Analysis, Department of Mathematics, University of Patras.
1.Variation of eigenvalues of a self-adjoint operator, when these depend on a real parameter and applications to boundary value-problems of differential equations and difference equations.
2. Applications of operator theory and measure theory to several problems, connected with orthogonal polynomials (Orthogonality measures, moment problems, Markov's theorem concerning Pade approximation of integrals and others).
3. Analytic solutions of linear and non-linear differential equations.