Sommaire

Closed retractions of Euclidean spaces
p. 1
Extension of closed mappings
p. 9
Fixed points of certain symmetric product mappings of a metric manifold
p. 19
Weights of denumerable topological spaces
p. 25
Absolute Z-sets
p. 29
On a generalization of Mycielski's and Znám's conjectures about coset decomposition of Abelian groups
p. 41
A new definition of the circle by the use of bisectors
p. 49
Radicals of semi-group rings
p. 57
An uncountable collection of mutually exclusive planar atriodic tree-like continua with positive span
p. 73
On smooth continua
p. 79
Corrections à l'article
p. 97