Mathematical Institute Newsletter
June 2004
 
 
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Toren Academiegebouw

The Mathematical Institute Newsletter is maintained by Jan-Hendrik Evertse. The newsletter is issued the first week of each month, except for July and August. 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").

There will be no newsletter in July and August. Copy for the September 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
 

  • Sjoerd Verduyn Lunel new scientific director per June 1.
     
    Per June 1, Sjoerd Verduyn Lunel will succeed Gerrit van Dijk as scientific director of the Mathematical Institute. Gerrit van Dijk has served our institute as a director since 1997.

  • PhD defense by José Antonio Rodriguez on Wednesday June 9.
     
    José Antonio Rodriguez will defend his PhD thesis on Wednesday June 9, 3:15 pm at the Academie Gebouw, Rapenburg 73, Leiden.
    Title thesis: Patterns described by discrete and continuous dynamical systems.
    Promotor: Prof.dr.ir. L.A. Peletier

  • PhD defense by Federica Pasquotto on Thursday June 24.
     
    Federica Pasquotto will defend her PhD thesis on Thursday June 24, 2:15 pm at the Academie Gebouw, Rapenburg 73, Leiden.
    Title thesis: On the geography of symplectic manifolds.
    Promotor: Prof.dr. H. Geiges (Universität Köln)

  • Symposium and reception on Friday June 18 on occasion of the 65th birthday of Marc Spijker.
     
    On Friday June 18, there will be a symposium on occasion of the 65th birthday of Marc Spijker, titled Stability of Numerical Methods for Time-Dependent Differential Equations.
    The aim of the symposium is to discuss both recent practical and theoretical advances concerning the stability of numerical methods for time-dependent differential equations.
    The symposium will take place in room 313 of the Mathematical Institute, Leiden University (building) Snellius, Niels Bohrweg 1, 2333 CA Leiden. Following the symposium there will be a reception.
    Please let Mrs. T.H. Bakker-Bouma (+ 31 71 5277111, tineke at math.leidenuniv.nl) know before June 4, 2004 if you wish to attend the symposium.
    For further information about the symposium please contact:
    F. Bakker (+ 31 71 527 7042, bakker at math.leidenuniv.nl)
    W. Hundsdorfer (+31 20 592 4211, Willem.Hundsdorfer at cwi.nl)
    K.J. in 't Hout (+ 1 208 426 1086, kinthout at math.boisestate.edu)
     
    Program:    

    09.30-10.00   Arrival, coffee
    10.00-10.05   Opening
    10.05-10.45    J.G. Verwer (CWI, Amsterdam/ University of Amsterdam): Stability of the Runge-Kutta-Chebyshev method for advection-diffusion-reaction problems
    10.50-11.30    A.E.P. Veldman (University of Groningen): Time integration on nonuniform grids
    11.35-11.50   Coffee
    11.50-12.30    M. Crouzeix (University of Rennes, France): Stability of time discretisations: the hilbertian context
    12.35-13.30   Lunch
    13.30-14.10    C. Palencia (University of Valladolid, Spain): The role of intermediate spaces in the study of the stability of time-dependent parabolic problem
    14.15-14.40    J.L.M. van Dorsselaer (Ministry of Defense, Amsterdam/The Hague): The Lanczos method in cryptography
    14.45-15.10     J.F.B.M. Kraaijevanger (Shell-SIEP, Rijswijk): Oil production, complete monotonicity and complex accumulation points
    15.15-15.30    Tea
    15.30-15.55    C. den Heijer (Philips Medical Systems, Best): The role of numerical mathematics in magnet design for MRI equipment
    16.00-16.25    W. Hundsdorfer (CWI, Amsterdam): Monotonicity and boundedness for linear multistep methods
    16.30-16.55    K.J. in 't Hout (Boise State University, USA): Stability of Runge-Kutta methods for delay differential equations
    17.00-17.05    Closure
    17.05-18.00    Reception

  • Workshop Automorphisms of curves from August 16-20.
     
    The above mentioned workshop will be organized at the Lorentz Center from Monday August 16- Friday August 20. The workshop is coordinated by G. Cornelissen and F. Oort (Utrecht).
    For further information see the website of the workshop.

  • Workshop Harmonic Analysis and Homogeneous Spaces from August 23-26 and special day on August 27 on occasion of the 65th birthday of Gerrit van Dijk.
     
    The above mentioned workshop will be organized at the Lorentz Center from Monday August 23- Thursday August 26. The workshop is coordinated by E. Opdam (Amsterdam), M. de Jeu (Leiden), S. Hille (Leiden), E. Koelink (Delft), W. Kosters (Leiden), M. Pevzner (Reims) and F. Bakker (Leiden).
    Consecutively, on Friday August 27, there will be a separate special day on the occasion of the 65th birthday of prof.dr. G. van Dijk and his retirement. His farewell speach is scheduled at 4:00 pm in the Academiegebouw.
    For further information see the website of the workshop.

  • Annual EAGER conference 2004 Workshop Algebraic Cycles and Motives from August 30-September 3.
     
    The above mentioned workshop will be organized at the Lorentz Center from August 30-September 3. The workshop is coordinated by S.J. Edixhoven (Leiden), J. Nagel (Lille) and C. Peters (Grenoble). The aim of the workshop is to bring together a number of the leading researchers in the field on the occasion of the 75th birthday of Prof. J.P. Murre. The theory of algebraic cycles and motives has always been at the center of Prof. Murre's research.
    For further information see the website of the workshop.

Guests
 

  • Guest of Peter Stevenhagen:
    - Hoang Le Thai is doing a traineeship from April 12-June 12. He will study the algebraic proof of Catalan's conjecture/Mihailescu's theorem that there is no pair of consecutive powers other than 8 and 9.

  • Guests of Arie Hordijk:
    - Dr. B. Gaujal, Dr. E. Thierry (Ecole Normale Superieure de Lyon) will visit the Mathematical Institute from June 13-20 in the framework of the Van Gogh project: Discrete event systems and optimization.

  • Guest of Rob Tijdeman:
    - Dr. L. Hajdu (University of Debrecen) will visit the Mathematical Institute from August 1-7.

Visits/lectures outside our institute

- Gerrit van Dijk: From May 29-June 5 he will be in Tunesia for a habilitation and a working visit.

- Reinier Bröker and Peter Stevenhagen: From June 12-18 they will attend the ANTS conference in Burlington, Vermont.

- Jan-Hendrik Evertse and Rob Tijdeman: From June 16-19 they will attend a conference in Waterloo, Canada, in honour of Dale Brownawell on the occasion of his 60th birthday. Further, from June 20-26 they will attend the CNTA conference in Toronto, Canada.

- Hendrik Lenstra: From June 20-26 he will attend the CNTA conference in Toronto.

- Luca Ferracina: From June 21-25 he will attend the 6th International Conference on Spectral and High-Order Methods (ICOSAHOM'04) held at Brown University in Providence, Rhode Island. He will give a lecture titled "TVB Runge-Kutta processes".
- Bert Peletier: From June 21-25 he will attend a colloquium in Paris, in honour of Haim Brezis on the occasion of his 60th birthday.

- Floske Spieksma: From July 17-July 26 she will attend the Workshop on Stochastic Networks, Montreal, Canada.

- Marcel de Jeu: From August 8-14 he will visit Lund University (Sweden).

- Frans Birrer: Between August 16-September 5 he will attend the Sixth International Conference on Social Science Methodology in Amsterdam, the 4S/EASST Conference on Science and Democracy in Paris, and the EURSAFE Conference on Science Ethics and Society in Leuven.

Technical reports

MI 2004-10   L.A. Peletier: Ordinary differential equations in pharmacodynamics.

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