A characterization of varieties of inverse semigroups.
A note on associative triples of elements in cancellation groupoids
A note on subdirectly irreducible groupoids
A note on the finite extensivity property
A realization of -groups
A remark on -systems in groups
Almost Periodic Functions on Hypergroups.
Bednarek's extension of Light's associativity test.
Commutative distributive groupoids
Constructions d'hyperanneaux à partir d'anneaux
Constructions of color schemes
Continuously factorable groupoids.
Cyclicity in a special class of hypergroups
Distributive groupoids and preradicals. I.
Distributive groupoids and preradicals. II.
Equational theories of some almost unary groupoids
Equivariant KK-theory for semimultiplicative sets.
Expansion in finite simple groups of Lie type
We show that random Cayley graphs of finite simple (or semisimple) groups of Lie type of fixed rank are expanders. The proofs are based on the Bourgain-Gamburd method and on the main result of our companion paper [BGGT].
Feebly canonical and 1-hypergroups