Participate in the CIMPA-ICTP online course of Professor Akram Yousofzadeh!

Join Professor Akram Yousofzadeh's course "Tarski Numbers and Different Solutions to Configuration Equations" from February 27 to March 2, 2023.  

Akram Yousofzadeh is a professor at Islamic Azad University Mobarakeh Branch (Iran).

The course will be given in English on zoom.

This is a recurrent meeting, so please register only once for all 4 sessions:

Registration link:…

The course will take place on the following days (Paris time zone):

  • Monday 27 February: 14:00 - 16:00 
  • Tuesday 28 February: 14:00 - 16:00
  • Wednesday 1 March: 14:00 - 16:00
  • Thursday 2 March: 14:00 - 16:00


The main objective of this course is to give a constructive way to compute upper bounds for the Tarski number of groups. Indeed we use a finite system of equations, with no normalized solution and define configuration graphs, to obtain a paradoxical decomposition of the given group. We also give a new equivalent condition for locally finiteness of groups.

Please note that the CIMPA/ICTP courses will be recorded and broadcasted on our Youtube channel "CIMPA Math" and on

Programme of other courses.

CIMPA does not provide certificates of attendance for online courses.

This course will be filmed at CIMPA (Nice, France).