Sommaire

Contents
Homegeneous groupoids
p. [3]
Opérations dérivées des treillis orthomodulaire (Part 1)
p. 7-14
On the extremal points of the closed unit balls in some abstract spaces
p. 15-22
Notes on left distributive groupoids
p. 23-37
Notes on associative triples of elements in commutative groupoids
p. 39-47
Quasitrivial groupoids and balanced identities
p. 49-64
The estimation of the dust content in the atmosphere of comet West 1975n
p. 65-76