Kalender
Här hittar du samlade händelser framöver inom LTHs tekniska och naturvetenskapliga områden, många med bäring på kommunikationsteknik. Till höger har du direktlänk till kalendern för Elektro- och Informationsteknik.
05
November
Algebra Seminar "Virtual retraction properties in groups”, by Jon Merladet Uriguen (University of Southampton)
Title: Virtual retraction properties in groups
Abstract: In this talk I will give an overview of retractions in groups. Given a group G, we say that a subgroup H is a virtual retract of G when H is a retract of a finite-index subgroup of G. If all cyclic/f.g subgroups of G are virtual retracts, we say that G has (LR)/(VRC).
Subgroups being virtual retracts may tell us if the group is residually finite, LERF, or how do subgroups embed on the whole group. I will discuss some motivations, and then expand on some extension problems: If G has (LR)/(VRC), what about its quotients? If a quotient of G has (LR)/(VRC), what about G? If G has (LR), what about wreath products of G with finite groups?
Disputationer
Följande disputationer är på gång:
27 Nov: Iman Vakili. Opponent: Prof. Andrea Neto