Bar-Ilan Algebra Seminar =========================================== Date: THURSDAY, 14 Av 5772 // August 2, 2012 ***NOTE THE UNUSUAL DAY*** Time: 10:30 am promptly Place: Third floor seminar room, Mathematics building Speaker: Prof. Boris M. Schein (University of Arkansas) Title: Infinitesimal bases and transitive representations of inverse semigroups Abstract: Every group is isomorphic to a group of permutations of a suitable set. Groups form a subclass of the class of inverse semigroups, the most important class of semigroups besides groups. Not every inverse semigroup is isomorphic to a transitive inverse semigroup of partial one-to-one transformations of a set. The problem of describing those inverse semigroups that admit such an isomorphism was raised in 1952. The speaker presents a new solution to this problem. --------------------------------------------------------- Technion Math Net-2 (TECHMATH2) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: Michael Schein <mschein@math.biu.ac.il>