1981/114/3

A class of spaces whose Cartesian product with every hereditarily Lindelöf space in Lindelöf

The Axiom of Determinateness and canonical measures

On a certain prewellordering

On pointwise smooth dendroids

Homotopies of small categories

Criteria of openness for relations

A rest point free dynamical system on ${\displaystyle R^3}$ with uniformly bounded trajectories

Cardinal functions on compact F-spaces and on weakly countably complete Boolean algebras