Sommaire

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