## Speaker:

Hyungwoon Koo

## Institution:

Korea University

## Time:

Tuesday, January 14, 2020 - 3:00pm to 3:50pm

## Host:

## Location:

RH 306

We discuss the compactness of the difference of two composition operators on Hardy spaces. The compact difference problem has been posed in conjunction with the topological properties of all compasition operators in 1980's and we give a measure theoretic charaction of this problem using the difference characterization of weighted composition operators in Bergman spaces.