Interpolation property in semigroups.
Invers SEMIGROUPS ON GRAPHS.
Kongruenzen in Rechtsverbandshalbgruppen.
L'application des demi-groupes à l'étude des matrices non-négatives
Les hypertas
Mapping Cylinders and Compact Monoids.
Monoids and decay.
Morita Equivalence of Monoids.
No semigroup is a finite union of mutants.
Non-uniqueness of homotopy factorizations into irreducible polyhedra
Note on commutativity in double semigroups and two-fold monoidal categories.
Note on the number of monoids of order
Null cones and pseudo-riemannian metrics.
O rozklade pologrupy zvyškov (mod ) na direktný súčin
Objets simpliciaux
On (0,1)-matrix semigroups.
On a problem of walks
In 1995, F. Jaeger and M.-C. Heydemann began to work on a conjecture on binary operations which are related to homomorphisms of De Bruijn digraphs. For this, they have considered the class of digraphs such that for any integer , has exactly walks of length , where is the order of . Recently, C. Delorme has obtained some results on the original conjecture. The aim of this paper is to recall the conjecture and to report where all the authors arrived.
On a simple one-element extension of left zero semigroups
On a sublattice- of the lattice of congruences on a 0-regular semigroup.
On almost semigroups