Mathematical Institute Newsletter
October 2002
 
 
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The Mathematical Institute newsletter is maintained by Jan-Hendrik Evertse. The newsletter will be 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").

Copy for the newsletter of November, such as announcements, personal notes, visits to conferences, guests, lectures of general interest, should be sent by e-mail to evertse@math.leidenuniv.nl before October 27. To avoid any inconvenient translating or typing work, copy should be submitted in English plaintext.


Agenda and announcements

  • NWO-OTKA Workshop Explicit Algebraic Number Theory

    Organizers: P. Stevenhagen, R. Tijdeman
    Dates/place: September 27-October 2, Lorentz Center
    Invited speakers: Y. Bilu (Bordeaux), J.-M. Couveignes (Toulouse), B. Edixhoven (Leiden), J. Klüners (Kassel), G. Lettl (Graz), H.W. Lenstra (Berkeley/Leiden), M. Pohst (Berlin), A. Schinzel (Warsaw), R. Schoof (Roma).
    Other participants include: I. Gaál (Debrecen), K. Györy (Debrecen), P. Mihailescu (Paderborn), A. Pethö (Debrecen).

  • General Colloquium:

    October 10, 4:00-5:00 pm, room 174
    Dr. F. Wiedijk (NIII, Katholieke Universiteit Nijmegen): Formalizing mathematics in the computer

    October 31, 4:00-5:00 pm, room 174
    Prof.dr. S.M. Verduyn Lunel (Universiteit Leiden): Calculating Hausdorff dimensions of invariant sets using spectral theory


Personal notes

  • New employees

    Ph.D. Students:

    - Drs. G. Wiese per September 1, 2002, with Prof.dr. S.J. Edixhoven.
    Goedendag,

    I am a PhD student of Bas Edixhoven and have started working under his direction in December 2001, while he was still in Rennes, and now I have moved with him to Leiden. Before that, I studied mathematics in Heidelberg, with a one year interlude in Cambridge (England). My principal interests are in number theory and arithmetic algebraic geometry and I am looking forward to working in Leiden.

    Veel groeten, Gabor

  • Guests:

    Guests of Prof. R. Tijdeman:

    -A.J. van der Poorten (Sydney, Australia) will be a Stieltjes visitor at Leiden University until October 19.
    -P.Z. Yuan (Changsha) will leave Leiden by the end of October.

Education

  • Doctoral exams, September 27, 2002

    - E. Randsdorp
    Graduation code: BW1
    Master's Thesis: The stationary solution of the equations of motion for a nematic liquid crystal in cylindrical flow
    Supervisor: Prof.dr. R. van der Hout

Research

  • Technical reports:
    MI 2002-21   L. Ferracina and M.N. Spijker: Stepsize restrictions for the toal-variation-diminishing property in general Runge-Kutta methods
    MI 2002-22   D.A. Cox, J. McKay, P. Stevenhagen: Principal moduli and class fields
    MI 2002-23   P. Stevenhagen: Triangles, squares, oranges and cuboids
    MI 2002-24   Arie Hordijk and Dinard van der Laan: On the average waiting time for regular routing to deterministic queues

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