Speaker:
Professor Hyungwoon Koo
Institution:
Korea University
Time:
Tuesday, February 14, 2012 - 3:00pm
Location:
RH 306
Composition operators in one variable have been studied very extensively.
But in several variables case the progress is very slow and even the boundedness of
the composition operator on the unit ball is not characterized yet, except the Carleson measure type characterization.
We survey the progress on the composition operators on the unit ball and discuss
some open problems.