Two models for contraction operators. (Deux modèles pour les opérateurs de contraction.)
Two Non-Negative Quadratic Forms.
Two point sets with additional properties
A subset of the plane is called a two point set if it intersects any line in exactly two points. We give constructions of two point sets possessing some additional properties. Among these properties we consider: being a Hamel base, belonging to some -ideal, being (completely) nonmeasurable with respect to different -ideals, being a -covering. We also give examples of properties that are not satisfied by any two point set: being Luzin, Sierpiński and Bernstein set. We also consider natural generalizations...
Two problems related to the non-vanishing of
We study two rather different problems, one arising from Diophantine geometry and one arising from Fourier analysis, which lead to very similar questions, namely to the study of the ranks of matrices with entries either zero or , where denotes the “centered” fractional part of . These ranks, in turn, are closely connected with the non-vanishing of the Dirichlet -functions at .
Two-sided approximations of inverses, square roots and Cholesky factors
Two-station queueing networks with moving servers, blocking, and customer loss.
Two-step relaxation Newton method for nonsymmetric algebraic Riccati equations arising from transport theory.
Über die Grade quadratischer Formen.
Über die Inversion gewisser unendlicher Matrizen.
Über die Konstruktion der Jordanschen Normalform.
Über die multiplikative Funktionalgleichung für stochastische Matrizen.
Über die multiplikative Funktionalgleichung für stochastische Matrizen. (Short Communication).
Über die Torsion der Witt-Gruppe Wq (A) eines semi-lokalen Ringes.
Über ein Iterationsverfahren für zyklische Matrizen
Über eine n-dimensionale Permutationspolynomgruppe.
Über eine Ungleichung von Schur.
Über einen algebraischen Satz, welcher in der Theorie der geometrischen Objekte auftritt
Über Endomorphismen, deren Minimalpolynom mit dem charakteristischen Polynom übereinstimmt.
Über konvergente Zerlegungen von Matrizen.
Über Matrizen mit semidefinitem Realteil.