Noncommutative Rings and applications

Next Seminar

Date: July 14, 2026

Time: 15:00 (São Paulo Time: UCT-3) 

Location: IME, Room B-10

Speaker: Andre Leroy (Artois University, France)

Title:  Singular maps and products of idempotents

Abstract:  

In this talk we will discuss the problem of decomposing "singular" maps into products of dempotents in different contexts.  In particular Maps from a set into itself, Matrices, Von Neumann regular rings and Banach Algebras will be considered. We will try to exhibit common features in these different settings and will relate the theory with the open problem of existence of von Neumann regular rings that are not separative.

This is a joint work with S.K. Jain (Ohio, USA) and Ajit Singh (India New Delhi).

Date: TBA, 2026

Time: 15:00 (São Paulo Time: UCT-3) 

Location: IME, Room TBA

Speaker: TBA

Title:  TBA

Abstract:  

TBA