Triangle contractive self maps of a Hilbert space
Triangle contractive self maps of the plane
Truncated spectral regularization for an ill-posed non-linear parabolic problem
It is known that the nonlinear nonhomogeneous backward Cauchy problem , with , where is a densely defined positive self-adjoint unbounded operator on a Hilbert space, is ill-posed in the sense that small perturbations in the final value can lead to large deviations in the solution. We show, under suitable conditions on and , that a solution of the above problem satisfies an integral equation involving the spectral representation of , which is also ill-posed. Spectral truncation is used...
T-stability approach to variational iteration method for solving integral equations.
Two fixed point theorems for abstract Markov operators.
Two fixed-point theorems for mappings satisfying a general contractive condition of integral type in the modular space.
Two fixed-point theorems for mappings satisfying a general contractive condition of integral type.
Two generic results in fixed point theory
We give two examples of the generic approach to fixed point theory. The first example is concerned with the asymptotic behavior of infinite products of nonexpansive mappings in Banach spaces and the second with the existence and stability of fixed points of continuous mappings in finite-dimensional Euclidean spaces.
Two modifications of the Leggett-Williams fixed point theorem and their applications.
Two Results on Jachymski-Schröder-Stein Contractions
We establish two fixed point theorems for certain mappings of contractive type.
Two topological definitions of a Nielsen number for coincidences of noncompact maps.
Über die Fixpunktmengen einer Klasse Volterrascher Integraloperatoren in Banachräumen.
Über die Lösungen Urysohnscher Integralgleichungen.
Über die Stabilität von Lösungen nichtlinearer Operatorengleichungen in nicht notwendig lokalkonvexen topologischen Vektorräumen
Über die verallgemeinerten Fixpunktindizes von Iterierten verdichtender Abbildungen.
Über Fixpunkte kompakter Abbilidungen in topologischen Vektorräumen
Un procédé itératif avec l'opérateur modifie et les problèmes d'approximation
Una generalizzazione di certe algebre che intervengono nella teoria dei sistemi
Une propriété topologique de l'ensemble des points fixes d'une contraction multivoque à valeurs convexes
In this Note we first establish a result on the structure of the set of fixed points of a multi-valued contraction with convex values. As a consequence of this result, we then obtain the following theorem: Let , be two real Banach spaces and let be a continuous linear operator from onto . Put: . Then, for every and every lipschitzian operator , with Lipschitz constant such that , the set is non-empty and arc wise connected.
Uniform asymptotic normal structure, the uniform semi-Opial property and fixed points of asymptotically regular uniformly Lipschitzian semigroups. I.