Mathematical Institute Newsletter
May 2005
 
 
  
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Toren Academiegebouw

The Mathematical Institute Newsletter is maintained by Jan-Hendrik Evertse. In general, the newsletter is issued the first week of each month, except for July and August. This year, there will be no newsletter in June. The electronic version of the newsletter can be found on http://www.math.leidenuniv.nl/~evertse/newsletter.shtml
(go to the homepage of the Mathematical Institute and click on "Newsletter").

Copy for the September 2005 newsletter, such as announcements, personal notes, visits to conferences, guests (with place of origin and date of arrival and departure), lectures of general interest, Ph.D. thesis defenses (with title of thesis), etc. should be sent by e-mail to evertse (at math.leidenuniv.nl) before August 27. Copy should be submitted in English plaintext, so that it can be inserted into the newsletter without time consuming typing or translating work.


Agenda and announcements

  • General Colloquium lectures on Thursdays May 12 in Leiden, May 19 in Delft, June 2 in Leiden, June 16 in Delft

    This spring there is a cooperation between the general mathematics colloquia of Delft and Leiden. The following lectures have been scheduled in May and June:

    May 12, 4:00-5:00, Leiden, Snellius room 174:
    Ben de Pagter: Representations, Boolean algebras and R-boundedness.

    May 19, 4:00-5:00, Delft, EWI-gebouw, room D, Mekelweg 4:
    Jan-Hendrik Evertse: Recent results on linear recurrence sequences.

    June 2, 4:00-5:00, Leiden, Snellius room 174:
    Roger Cooke: TBA

    June 16, 4:00-5:00, Delft, EWI-gebouw, room D, Mekelweg 4:
    Marcel de Jeu: TBA

    For further information see http://www.math.leidenuniv.nl/~evertse/colloquium.shtml.

  • Intercity Number Theory Seminar on Friday May 13 in Leiden

    The program consists of lectures by Joost Batenburg (Leiden/CWI), Oliver Lorscheid (Utrecht), and Willem Jan Palenstein, Bas Jansen and Reinier Bröker from Leiden.
    Time/place: 1:30-5:00 in room 412 of the Snellius.
    Further information: http://www.math.leidenuniv.nl/~desmit/ic.

  • Erasmus Mundus ALGANT meeting on Friday May 27

    On Friday May 27, the Erasmus Mundus master ALGANT of the algebra and geometry groups of the MI will have an organizational meeting involving the local organizers (Edixhoven & Stevenhagen), the UL International Office and various representatives of the other two partners in the consortium (Bordeaux and Padova). The meeting will take place in the Academiegebouw (morning) and in Snellius 174 (afternoon).

  • First bachelor diploma presented to Yurii Khomskii

    On April 18 Yurii Khomskii was the first student to obtain a bachelor's degree at our institute. His thesis on Banach algebras was supervised by Marcel de Jeu.

  • Presentation of bachelor diplomas and Traditional Institute Barbecue on Friday June 24

    On Friday June 24 there will be the first presentation of the bachelor diplomas in mathematics. After this presentation, starting at 5:00 pm there will be a barbecue for personnel and students of the Mathematical Institute. The barbecue will be at the inner court opposite to the FooBar. The barbecue will be organized by a group of PhD. students under supervision of Jeanine Daems.

  • Dutch Mathematical Conferences of 2006 and 2007 organized by Delft and Leiden

    The NMC 2006 and NMC 2007 (Dutch Mathematical Conferences of 2006 and 2007) are organized jointly by the mathematical institutes of the Technische Universiteit Delft and the Universiteit Leiden, under the auspices of the Koninklijk Wiskundig Genootschap. NMC 2006 will take place in Delft and NMC 2007 in Leiden. The dates of NMC 2006 have been fixed on Monday March 27 and Tuesday March 28, 2006.
    The organization committee of NMC 2006 consists of Jan Aarts, Martin van Gijzen, Klaas Pieter Hart, Arnold Heemink, Erik Koelink (chairman), Cor Kraaikamp, Ludolf Meester, Evelyn Sharabi, Fred Vermolen and Jacob van der Woude from Delft and Jan-Hendrik Evertse and Rein van der Hout from Leiden. The organization committee of NMC 2007 will consist of Jan-Hendrik Evertse and Rein van der Hout, some other people from Leiden and some people from Delft.

  • Workshop "Arithmetic Geometry and High Energy Physics" from August 29-September 2 at Lorentz Center

    Further information.

  • Intercity Number Theory Seminars on Friday September 2, September 9 and October 7 in Leiden

    On September 2 there will be a special program around the PhD. defense by Gabor Wiese. On September 9 there will be a special day on the ABC conjecture for a general audience (in room 312 of the Snellius). On October 7 there will be a joint session with the Intercity Geometry Seminar. Part of the program will be the Kloosterman lecture delivered by Johan de Jong.
    See http://www.math.leidenuniv.nl/~desmit/ic for further information.

  • PhD. defense by Gabor Wiese on Friday September 2 at 2:15

    Title of thesis: Modular Forms of Weight One over Finite Fields
    Supervisor: Prof. S. Edixhoven

  • PhD. defense by Luca Ferracina on Tuesday September 6 at 3:15

    Title of thesis: Monotonicity and Boundedness in general Runge-Kutta methods
    Supervisors: Prof. M.N. Spijker and Prof. J.G. Verwer (UvA/CWI)

  • Stieltjes Afternoon on Thursday September 15 at CWI

    The Stieltjes afternoon of 2005 is held at the CWI. There will be lectures by Aad van der Vaart (VU), Gordon Slade (University of British Columbia, Vancouver), and by the Stieltjes Professor 2005 Offer Kella (Hebrew University, Jerusalem). Further, Jan Karel Lenstra will present the Stieltjes Ph.D.-student prize and the winner of the prize will give a lecture. The program starts at 2:00. The lectures are in room Z009 (the "Eulerzaal".)

  • Frank den Hollander elected as new KNAW-member

    The KNAW (Royal Dutch Academy of Arts and Sciences has elected thirteen new members, among whom Frank den Hollander, professor in Probability theory at our institute.

Doctoral exams

- Sheila Margherita Sandon
Date: April 18
Title Master's thesis: On the Chern correspondence for principal fibre bundles with complex reductive structure group
Graduation committee: Prof. dr. P. Stevenhagen (chairman), Dr. M. Lübke (supervisor), Prof.dr. S.J. Edixhoven, Dr. B. de Smit.

- Erica Arja Wubben
Date: June 3
Title Master's thesis: Doorstroommodel Power/Approach. Een beleidsondersteunend systeem
Graduation committee: Prof.dr. P. Stevenhagen (chairman), Prof.dr. L.C.M. Kallenberg (supervisor), Dr. F.M. Spieksma.

- Bert Greevenbosch
Date: June 29
Title Master's thesis: On the separation of sounds of musical instruments
Graduation committee: Prof.dr. P. Stevenhagen (chairman), Dr. D.R. Pik (supervisor), Prof.dr. S.M. Verduyn Lunel, ?.

- Timon Idema
Date: June 29
Title Master's thesis: The behaviour and attractiveness of the Lotka-Volterra equations
Graduation committee: Prof.dr. P. Stevenhagen (chairman), Prof.dr. S.M. Verduyn Lunel (supervisor), Dr. J.F. Williams, Prof.dr. L.A. Peletier.


Personal notes

New personnel:

- drs. P.C. Svensson, Ph.D. student with Prof. Sjoerd Verduyn Lunel and Dr. Marcel de Jeu, per February 1, 2005.

- dr. F Redig, ud probability theory with prof. Frank den Hollander, per April 1, 2005

- drs. J.F. Brakenhoff, Ph.D. student with prof. Hendrik Lenstra, per May 1, 2005

- F.W. van Rest, webmaster under supervision of dr. Sander Hille,per May 1, 2005
"I'm Frank van Rest. As of May I'm webmaster of math.leidenuniv.nl. I'll work one day a week. Other than that I'm a student in my second year and in my spare time I like to play basketball. I'm really looking forward to working on the site, and any feedback is always welcome."

- A.L. Kret, co-worker editorial board KWG, per April 1, 2005


Guests

  • Guests of Bas Edixhoven:

    - Carlo Gasbarri (Roma 2) will be a guest of Bas Edixhoven on May 19,20. On May 19 he will give a talk in the Geometry Seminar in Leiden.
    - Thibaut Pugin (École Polytechnique, Palaiseau) is visiting our institute for an internship with Bas Edixhoven for 3 months starting on April 11.

  • Guests of Rob Tijdeman:

    - Lajos Hajdu (Debrecen) will visit Rob Tijdeman from July 2-9.
    - Shanta Laishram (Tata Institute, Mumbai) will visit Rob Tijdeman from July 10-23.

Visits/lectures outside our institute

- Sjoerd Verduyn Lunel: From April 21-24 he will attend the LCDS workshop. Next he will visit John Mallet-Paret (Brown University, Providence) until April 29 and Don Estep (Colorado State University, Fort Collins) until May 10. On April 21, April 27 and May 2 he will give lectures (conference lecture, analysis seminar, colloquium).

- Bert Peletier: From April 27-May 10 he will visit Boston University. From June 5-9 he will visit the University of Tours for a conference on occasion of the honorary doctorate from that university for J. Serrin.

- Sara van de Geer: She will attend the Francqui Workshop, Brussels, May 12, 13 and the FoCM (Foundations of Computational Mathematics) 2005 conference, Santander, Spain, June 30-July 9.

- Willem van Zwet: He will attend the Francqui Workshop, Brussels, May 12, 13.

- Peter Stevenhagen: From May 16-20 he will attend the workshop "Recent developments in algorithmic Number Theory" at CIRM, Luminy.

- Rob Tijdeman: He will visit the University of Debrecen from May 21-28. From June 11-18 he will participate in a special semester on Diophantine Geometry at the Centro di Ricerca Matematica Ennio De Giorgi in Pisa.

- Ronald Cramer: He is the Scientific Program Chair of the 24th Annual IACR EUROCRYPT, May 22-26, in Aarhus, Denmark. He will be a Guest Professor at CRM (Centre de Recerca Matemática) in Barcelona, from May-July. He is an invited speaker at "Mathematics and Telecommunications" organized by Real Sociedad de Matemáticas Espanola (RSME) in Barcelona on June 8. Further he is a co-organizer of a special semester on Mathematics of Cryptology at CRM. and of an international workshop from June 21-23 2005 at CRM, Barcelona.

- Jan-Hendrik Evertse: From May 23-June 18 he will participate in a special semester on Diophantine geometry at the Centro di Ricerca Matematica Ennio De Giorgi in Pisa. Further, from August 21-September 3 he will visit the university of Debrecen.

Technical reports

MI 2005-07   L. Ferracina and M.N. Spijker: Computing optimal monotonicy-preserving Runge-Kutta methods.
MI 2005-08   H. Brezis and L.A. Peletier: Elliptic equations with critical exponent on spherical caps of S3

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