Special morphisms of groupoids.
Stability of a functional equation coming from the characterization of the absolute value of additive functions.
Strict nuclei and pseudoautomorphisms of grupoids with division
Strong morphisms of groupoids.
Structure de l'ensemble des fermetures d'un treillis complet
Subdirectly irreducible groupoids in some varieties
Symmetrisations of semigroups.
Tensor products of topological ringoids
Ternary structures and groupoids
The classifying topos of a continuous groupoid. II
The equivalence of -groupoids and crossed complexes
The equivalence of -groupoids and cubical -complexes
The groupoid of varieties of idempotent semigroups.
The lattice of convex subgroupoids of an ordered groupoid.
The low-dimensional homology of crossed modules.
The partial groupoid of idempotents of a regular semigroup.
The tensor product of groupoids
Théorie des groupoïdes symplectiques
Tolerances on poset algebras
To everz partiallz ordered set a certain groupoid is assigned. A tolerance on it is defined similarlz as a congruence, onlz the requirement of transitivitz is omitted. Some theorems concerning these tolerances are proved.
Torsion groupoids