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
Transformation groupoids and bundles of Banach spaces
Translations in Idempotent Groupoids
Twisted K-theory of differentiable stacks