Facets of Geometry

a tribute to

Torsten Ekedahl & Mikael Passare

Stockholm University June 3-7,2013

Torsten Ekedahl 1956-2011 Mikael Passare 1959-2011

About Facets of Geometry

Welcome to the conference "Facets of Geometry"!

The purpose of the conference is twofold. Firstly, we want to honor the memory of our dear colleagues Torsten Ekedahl and Mikael Passare who passed away prematurely. For this reason we invite their collaborators, friends and students to give talks in the main areas of their mathematical activity.
Secondly, we have an ambition to organize a broader event presenting leading areas of research in mathematics at Stockholm university where both were employed for the major part of their professional lives.
On June 5 there will be a special event devoted to the memory of Torsten and Mikael. In the afternoon this day some entertainment/excursion will be provided.

Notice that all talks on this conference are by invitation, but our prospective participants are very welcome to present their research in the form of a poster.

For questions concerning the scientific program, please, contact Boris Shapiro, shapiro@math.su.se

For other questions related to the conference, please, send a message to fgeoreg@konf.su.se

Structure of the conference.

The conference is organized into four different special sections with their own moderators.


Tropical Geometry and Amoebae

(I. Itenberg and B. Shapiro)
Plenary speaker: Grigory Mikhalkin (Université de Geneve)

Section speakers:
  1. Erwan Brugallé (Université Pierre et Marie Curie - Paris 6)
  2. Mikhail Kapranov (Yale University)
  3. Viatcheslav Kharlamov (Université de Strasbourg)
  4. Diane Maclagan (University of Warwick)
  5. Hannah Markwig (Universität des Saarlandes)
  6. Mounir Nisse (Texas A&M university)
  7. Jean-Jacques Risler (Université Pierre et Marie Curie - Paris 6)
  8. Eugenii Shustin (Tel Aviv University)
  9. August Tsikh (Siberian Federal University)
  10. Oleg Viro (State University of New York at Stony Brook)

Moduli Spaces and Operads

C. Faber and S. Merkulov
Plenary speaker: Gerard van der Geer (Universiteit van Amsterdam)
Section speakers:
  1. Anton Alekseev (Geneva University)
  2. Alexander Berglund (Stockholm University)
  3. Rahul Pandharipande (ETH Zurich)
  4. Dan Petersen (KTH)
  5. David Rydh (KTH)
  6. Sergei Shadrin (Universiteit van Amsterdam)
  7. Michael Shapiro (Michigan State University)
  8. Nick Shepherd-Barron (University of Cambridge)
  9. Bruno Vallette (Universite de Nice Sophia Antipolis)
  10. Thomas Willwacher (Harvard University)

Geometry in Several Complex Variables

M. Andersson and Bo Berndtsson
Plenary speaker: Jean-Pierre Demailly, (Grenoble)
Section speakers:
  1. Peter Ebenfelt (UC San Diego)
  2. Mattias Jonsson (Ann Arbor Michigan)
  3. Jan-Erik Björk (Stockholm University)
  4. Timur Sadykov (Moscow State University)
  5. Håkan Samuelsson (Chalmers)
  6. Ragnar Sigurdsson (University of Iceland)
  7. Elizabeth Wulcan (Chalmers)
  8. Xing Yang (Lund University)
  9. Alain Yger (Université de Bordeaux)
  10. Ahmed Zeriahi (Université de Toulouse)

Spectral Geometry

A. Laptev and P. Kurasov
Plenary speaker: Peter Perry (University of Kentucky)
Section speakers:
  1. Carolyn Gordon (UC Berkeley)
  2. Anders Karlsson (Univ. of Geneva)
  3. Richard Kenyon (Brown Univ)
  4. Michael Loss (Georgia Tech)
  5. Rafe Mazzeo (Stanford University)
  6. Olga Rossi (Ostrava & La Trobe U)
  7. Johannes Sjöstrand (Paris 6)
  8. Uzy Smilansky (Weizmann Institute of Science)
  9. Toshikazu Sunada (Meiji University, Tokyo)

How to get to the conference and where to live?

The conference is held at Stockholm University

Please refer to the map to see the where the conference is held (green markers). Hotels and hostels are located at the blue and pink markers. The complete list of the selected hotels may be found on the Accomodation Page.

Where to live

The Accomodation Page displays a list of selected hotels and hostels accomodating different budgets. You will find contact information for each hotel which you will find useful to make Your reservation at a Hotel of your choice.

How do I register to the conference?

To register to the conference Facets of Geometry please visit the registration page, where you will find an online registration procedure.


Mikael Passare 1959-2011

Mikael Passare was born in Västerås, Sweden, on January 1, 1959 and defended his PhD thesis att Uppsala university on December 15, 1984 under supervision of Christer Kiselman. In 1994 he was appointed as a professor at Stockholm university.

At the time of his death, Mikael Passare was a deputy director for Institut Mittag-Leffler, president of Swedish Mathematical Society, director for Stockholm Mathematical Center and chair of the Swedish National Committee for Mathematics.

Mikaels mathematical interests lied primarily in complex analysis in several variables, in particular residue currents and amoebae. Tropical geometry attracted his attention in recent years.

Mikael received several distinguished awards for his research: Wallenberg Prize in 1988, Thuréus Prize in 1991 and Göran Gustafsson Prize in 2001.

Professor Passare was very much appreciated as an enthusiastic teacher, he supervised 9 PhD students.

Mikael Passare died from a sudden cardiac arrest in Oman on 15 September 2011.

We remember Mikael as an eminent mathe- matician and a charming person, always open and friendly to people around him.

Torsten Ekedahl 1956-2011

Torsten Ekedahl was born in Lund, Sweden on August 11, 1955. He showed great interest in mathematics already in high school. He won the Swedish High School Mathematical Competition in 1974. He started his mathematical studies in University of Gothenburg shortly thereafter. As early as 1978 he came in contact with a number of famous mathematicians working in the field of algebraic geometry, who were impressed by his mathematical talent. He spent a year in Århus and then a year in IHES, Paris working with Luc Illusie. In fall 1983 he defended his thesis "On the multiplicative properties of the de Rham-Witt complex" under the advisorship of J. Brzezinski. His results were highly appreciated by S. Bloch, P. Deligne and M. Atiyah. In 1984 he joined the Department of Mathematics, Stockholm University as a lecturer, and became a full professor in 1988.. He worked in our department until his death. In 1990 he was elected as a Member of the Swedish Academy of Science. In 1994 he received the Göran Gustafsson award in mathematics. He was a member of the advisory board of the Mittag-Leffler Institute and a member of the Swedish Research Council.

Very characteristic for Torsten was the broadness of his interests which included good knowledge of several languages including Japanese, encyclopedic mathematical education, and general cultural interests, for example in music and cinema. His mathematical background was enormous, and he could answer or give some hints to questions related to practically all fields of mathematics from mathematical logic to differential equations. He gave a number of well-attended popular talks on different aspects and applications of mathematics. He was highly appreciated as an advisor. He was always full of energy, humor and enthusiasm.

Torsten Ekedahl died from a massive heart attack at our department on November 23, 2011.

We miss Torsten both as a influential visionary mathematician as a clever administrator, and as a interesting person with encyclopedic knowledge. Rest in peace.