Sommaire du Fascicule no. 1

Contents
Reversibility for diffusions via quasi-invarience
p. 3-10
Commutative radical rings. I.
p. 11-41
Groupoids and the associative law VIIA. (SH-groupoids of type (A, B, A) and their semigroup distances)
p. 43-54
Transitive closures of binary relations. I.
p. 55-69
Transitive closures of binary relations II.
p. 71-80
Trees in commtative nil-semigroups of index two
p. 81-101

Sommaire du Fascicule no. 2

Foreword
Embedding topological semigroups into the hyperspaces over topological groups
p. 3-18
Mad families and ultrafilters
p. 19-35
Non-normality and relative normality of Niemytzki plane
p. 37-41
A note on $\Cal J$-ultrafilters and $P$-points
p. 43-48
$c$-Luzin sets, nonatomic $\sigma$-fields and $\sigma$-independent sets
p. 49-53
Theorem on signatures
p. 55-67
Constructing subsets of a given packing index in Abelian groups
p. 69-80
Fourier series and the Colombeau algebra on the unit circle
p. 81-93