Sommaire du Fascicule no. 1

Contents
[On the conference “Binary systems and ring theoretic methods in universal algebra”]
Varieties of left distributive semigroups
p. 3-18
On a class of near-rings sum of near-fields
p. 19-27
Finiteness conditions for semigroup rings
p. 29-32
On Bol loops of order $4k$
p. 33-35
Classification of Bol loops of order 18
p. 37-44
On nonexistence of oriented cycles in Auslander-Reiten quivers
p. 45-52
Two enumeration principles for free algebras
p. 53-58
Some examples of Bol loops
p. 59-68
Geometric hyperquasigroups and line spaces
p. 69-73
Prime ideals in universal algebras
p. 75-87

Sommaire du Fascicule no. 2

Contents
On hereditary subdirectly irreducible graphs
p. 3-10
Strong decomposability of ultrafilters on cardinals with countable cofinality
p. 11-26
Zum Ladungsträgertransport in transparenten elektrophotographischen Polyvinylkarbazol: 2, 4, 7, Trinitrofluorenon-Selen-Schichten
p. 27-42
Dust in central regions of five Seyfert galaxies
p. 43-56