Seminario L2-invariants 
 
https://www.icmat.es/rt/l2invariants2018/index.php 
 
Jueves 22/2/2018 
12:00, Aula Gris 1, ICMAT 
Ponente: Lukasz Grabowski 
(Lancaster) 
 
Title: Almost commuting matrices with respect to the rank metric 
 
Abstract: I will present my recent result with Gabor Elek, which deals 
with the variant of the "Halmos problem" for the rank metric. A 
particular case is as follows: if A and B are either unitary or 
self-adjoint matrices that almost commute with respect to the rank 
metric, then one can find commuting matrices C and D which are close 
in the rank metric to the matrices A and B respectively.