Workshop on Numerical Ranges and Numerical Radii

Wednesday, June 13, 2018 - 12:00pm to Sunday, June 17, 2018 - 1:00pm

The Fourteenth Workshop on Numerical Ranges and Numerical Radii will take place at the Technical University, Munich, June 13 to June 17, 2018.

The year 2018 marks the 100 anniversary of the celebrated Toplitz-Hausdorff Theorem (1918/1919) asserting the numerical range of an operator is always convex. There has been a lot of research activities on the topic after this fundamental result was established. The high level of research activities are due to the many connections of the subject to different pure and applied areas.

The purpose of the workshop is to stimulate research and foster interaction of researchers interested in the subject. The informal workshop atmosphere will facilitate the exchange of ideas from different research areas and, hopefully, the participants will leave informed of the latest developments and newest ideas.

One may visit the website WONRA ( to see some background about the subject and previous meetings, and also  the Wiki page

for the history of the workshop and related meetings on the subject.

To celebrate the 100 anniversary of the Toplitz-Hausdorff Theorem, there will be a special workshop in the summer of 2019 held in Japan (Kyoto/Osaka area), and the 2020 workshop following the usual schedule at  Portugal (Coimbra), in the summer of 2020.

One may visit the 2018 workshop page for update information and registration details of the 2018 workshop.

Hope to see you in Munich.

Organizers of 2018 Workshop on Numerical Ranges and Numerical Radii

Douglas Farenick, University of Regina.
David Kribs, University of Guelph.
Chi-Kwong Li, College of William and Mary.
Sarah Plosker, Brandon University.
Thomas Schulte-Herbruggen, Technical University, Munich.

Technical University of Munich
Arcisstraße 21
80333 Munich