banner USF Home College of Arts & Sciences OASIS myUSF USF A-Z Index

USF Home > College of Arts and Sciences > Department of Mathematics & Statistics

Mathematics & Statistics
pendulum
  Colloquium Archive

Colloquia — Fall 2017

Friday, November 17, 2017

Title
Speaker


Time
Place
Sponsor

TBA
Ian McQuillan
Department of Computer Science
University of Saskatchewan
3:00pm-4:00pm
CMC 130
Nataša Jonoska

Abstract

TBA

Friday, October 13, 2017

Title
Speaker


Time
Place
Sponsor

TBA
Bei Wang
Scientific Computing and Imaging Institute
University of Utah
3:00pm-4:00pm
CMC 130
Masahiko Saito

Abstract

TBA

Friday, October 6, 2017

Title
Speaker


Time
Place
Sponsor

On exceptional sets of some operator sequences
Grigori Karagulyan
Institute of Mathematics
National Academy of Sciences of Armenia
3:00pm-4:00pm
CMC 130
Arthur Danielyan

Abstract

TBA

Friday, September 1, 2017

Title
Speaker

Time
Place
Sponsor

Weak Commutativity in Groups
Said N. Sidki
Universidade de Brasília
3:00pm-4:00pm
CMC 130
Dima Savchuk

    

Abstract

The topic of this lecture is a group functor which we introduced in 1980. Precisely, given a group \(G\) and an isomorphic copy of it \(G^\psi\) where \(\psi\) is the isomorphism, we defined $$ \chi(G)=\langle G,G^\psi\mid gg^\psi=g^\psi g\text{ for all }g\in G\rangle. $$ It was shown that the group \(\chi(G)\) has a section isomorphic to the second homology group \(H_2(G,ℤ)\). The functor \(\chi\) preserves a number of classes of groups such as: finite \(\pi\)-groups (\(\pi\) a set of primes); finite nilpotent groups; solvable groups; nilpotent groups; polycyclic-by-finite groups. Recently, Bridson and Kochloukova added to this list the important class of finitely presented groups.