Ueber die Gültigkeits-Bedingungen des Taylor'schen Lehrsatzes für reelle Veränderliche.
Ueber die nothwendigen und hinreichenden Bedingungen des Taylor'schen Lehrsatzes für Functionen einer reellen Variablen
Ueber Functionen, welche in gewissen Punkten endliche Differentialquotienten jeder endlichen Ordnung, aber keine Taylor'sche Reihenentwickelung besitzen
Ultraproducts in Banach space theory.
Ultrapuissances et applications dans le cadre de l'analyse non standard
Un modèle de filtres pour l'analyse réelle synthétique
Un théorème de fonctions implicites sur certains espaces de Fréchet et quelques applications
Une théorie générale des infinitésimaux
Uniformly Continuous Set-Valued Composition Operators in the Spaces of Functions of Bounded Variation in the Sense of Riesz
We show that any uniformly continuous and convex compact valued Nemytskiĭ composition operator acting in the spaces of functions of bounded φ-variation in the sense of Riesz is generated by an affine function.
Upper quasi continuous maps and quasi continuous selections
The paper deals with the existence of a quasi continuous selection of a multifunction for which upper inverse image of any open set with compact complement contains a set of the form , where is open and , are from a given ideal. The methods are based on the properties of a minimal multifunction which is generated by a cluster process with respect to a system of subsets of the form .