Erratum to the paper “Composants of the horseshoe” by Christoph Bandt (Fund. Math. 144 (1994), 231–241)
Espaces fonctionnels et théorèmes de I. Namioka
Espaces et espaces des applications continues
Espaces -complètement réguliers
Essential -type maps and Birkhoff–Kellogg theorems.
Essentially Complete T...-Spaces.
Essentially Complete T...-Spaces II. A Lattice-Theoretic Approach.
Étude de la stabilité d'un système dynamique stationnaire par la méthode de Lyapounov
Every Lusin set is undetermined in the point-open game
We show that some classes of small sets are topological versions of some combinatorial properties. We also give a characterization of spaces for which White has a winning strategy in the point-open game. We show that every Lusin set is undetermined, which solves a problem of Galvin.
Example of a convergence commutative group which is not separated
Examples of sequential topological groups under the continuum hypothesis
Using CH we construct examples of sequential topological groups: 1. a pair of countable Fréchet topological groups whose product is sequential but is not Fréchet, 2. a countable Fréchet and topological group which contains no copy of the rationals.
Exemples d'actions non continues d'un groupe dans un compact.
Existence and approximation of fixed points for set-valued mappings.
Existence and data dependence for multivalued weakly Ćirić-contractive operators.
Existence and data dependence of fixed points and strict fixed points for contractive-type multivalued operators.
Existence of extremal solutions for quadratic fuzzy equations.
Existence of fixed point results in -metric spaces.
Existence of fixed points on compact epilipschitz sets without invariance conditions.
Existence of invariant measures for piecewise continuous transformations
Existence of joins and meets in the partially ordered family of CM-homomorphisms.