Obere Schranken für Eigenwerte von Eigenwertaufgaben der Form (...2 I Â?...A Â? B) x = 0 . - Upper Bounds for Eigenvalues of Quadratic Eigenvalue Problem.
On a class of nonlinear eigenvalue problems
On a method of D. Marsal for equations with positive operators
On superadditive rates of convergence
On the Approximate Solution of Operator Equations.
On the Approximative Construction of the Eigenvectors Corresponding to a Pair of Complex Conjugated Eigenvalues
On the convergence of gelerkin approximations
On the convergence of modified relaxation methods for extremum problems
On the Global Convergence of Halley's Iteration Formula.
On the Stability of the Functional Quadratic on A-orthogonal Vectors
On the Stability of the Ritz Procedure for Nonlinear Problems.
Optimale Approximation linearer Funktionale auf periodischen Funktionen.
Optimale Interpolations- und Approximationssysteme.