Thursday 7 November 2024 at 2 pm, as part of the Al@Bicocca seminar cycle, Ángel del Río (Universidad de Murcia) will talk about
Title: On groups with quadratic rational character values
Abstract: A finite group is said to be rational or rationally valued if its the character table of is formed by rational numbers. For example all symmetric group are rational. Rational groups have been widely studied. During the last years some generalizations of rational groups have attracted the interest of several authors. The common feature of these groups is that each character of every element of G belongs to a quadratic extension of the rationals. These have led to several classes of groups depending on whether it requires that the full character table is contained in a quadratic extension of the rational, or this condition is required per rows or columns of the character table. In this talk we will introduce the different families of groups and present some results on their structure.
Information to attend
The seminar will be held in Room 3014 (3rd Floor) - U5 Building, University of Milan-Bicocca and will also be available online at the following Webex link