

The Mathematical Institute Newsletter is maintained
by JanHendrik 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").
Copy for the June 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 email to
evertse at math.leidenuniv.nl
before May 27. The June newsletter will cover
June, July and August, so also copy related to July and August
may be submitted.
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

Intercity Number Theory Seminar on Friday May 14 in Leiden
P. Cartier: An algebraic theory of iterated integrals
For further information,see
http://www.math.leidenuniv.nl/~desmit/ic/current.html.

Workshop Harmonic Analysis and Homogeneous Spaces
from August 2326 and special day on August 27 on occasion
of the 65th birthday of Gerrit van Dijk.
This is a preliminary announcement of the above mentioned workshop,
which will be organized at the Lorentz Center
from Monday August 23 Thursday August 26.
The workshop is organized by E. Opdam (Amsterdam),
M. de Jeu (Leiden), S. Hille (Leiden), E. Koelink (Delft), W. Kosters
(Leiden), M. Pevzner (Reims) and F. Bakker (Leiden).
For
further information see
http://www.lc.leidenuniv.nl/lc/web/2004/20040823/info.php3?wsid=122.
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 16.00 hours in the
Academiegebouw.

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 TimeDependent Differential Equations.
The aim of
the symposium is to discuss both recent practical and theoretical
advances concerning the stability of numerical methods for
timedependent 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. BakkerBouma (+ 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: 


09.3010.00   Arrival, coffee 
10.0010.05   Opening 
10.0510.45  
J.G. Verwer (CWI, Amsterdam/ University of Amsterdam):
Stability of the RungeKuttaChebyshev method for
advectiondiffusionreaction problems 
10.5011.30  
A.E.P. Veldman (University of Groningen):
Time integration on nonuniform grids 
11.3511.50   Coffee 
11.5012.30  
M. Crouzeix (University of Rennes, France):
Stability of time discretisations: the hilbertian context

12.3513.30   Lunch 
13.3014.10  
C. Palencia (University of Valladolid, Spain):
The role of intermediate spaces in the study of the stability of
timedependent parabolic problem

14.1514.40  
J.L.M. van Dorsselaer (Ministry of Defense,
Amsterdam/The Hague):
The Lanczos method in cryptography

14.4515.10  
J.F.B.M. Kraaijevanger (ShellSIEP, Rijswijk):
Oil production, complete monotonicity and complex accumulation points

15.1515.30  
Tea 
15.3015.55  
C. den Heijer (Philips Medical Systems, Best):
The role of numerical mathematics in magnet design for MRI equipment

16.0016.25  
W. Hundsdorfer (CWI, Amsterdam):
Monotonicity and boundedness for linear multistep methods

16.3016.55  
K.J. in 't Hout (Boise State University, USA):
Stability of RungeKutta methods for delay differential equations

17.0017.05  
Closure 
17.0518.00  
Reception 
Guests

Guest of Peter Stevenhagen:

 Hoang Le Thai is doing a traineeship from April 12June 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 1320 in the framework
of the Van Gogh project: Discrete event systems and optimization.
Visits/lectures outside our institute


 Peter Stevenhagen:
On May 7, he will give a lecture at the cryptography seminar
in Rennes, titled "Constructing elliptic curves by padic methods."
Further information:
http://www.math.univrennes1.fr/crypto/seminaire.html.


 Bill Hart, Hendrik Lenstra and Peter Stevenhagen:
From May 1621 they will attend the Dagstuhl seminar
"Algorithms and Number Theory."
Further information:
http://www.dagstuhl.de/04211.


 Bart de Smit and Hendrik Lenstra:
In May they will give two Escher lectures.
Bart de Smit:
"The elliptic curve in Escher's Print Gallery."
London Mathematical Society Midlands Regional Meeting
School of Mathematical Sciences, University of Nottingham,
Wednesday May 12, 2004.
Further information:
http://www.lms.ac.uk/meetings/Midlands04.html.
Hendrik Lenstra:
"Riemann, Escher en Droste."
Koninklijke Hollandsche Maatschappij der Wetenschappen"
May 15, 2004, Haarlem.
Further information:
http://www.hollmij.nl/HMWHVDR.htm.


 Rob Tijdeman: From May 1020 he will visit the
University of Ostrava, Czech Republic,
in the framework of the common ErasmusSocrates project.
He shall give lectures and be a jury member at the thesis defense
of Simona Sobkova.


 Marc Spijker and Luca Ferracina: From May 1821
they will attend "The
Third International Conference on the Numerical Solution of Volterra and
Delay Equations" held at the Department of Mathematics and Statistics,
Arizona State University, Tempe, Arizona. M.N. Spijker will give an
invited lecture on "General monotonicity properties in RungeKutta
procedures". L. Ferracina will give a lecture on "Bounded RungeKutta
processes".


 Marcel de Jeu: From May 17 he will attend
the Fourth Annual Meeting of the European
Research Network "Analysis and Operators" in Dalfsen, Netherlands.


Technical reports


MI 200407  
L.A. Peletier and J.A. Rodriguez:
The discrete SwiftHohenberg equation. 
MI 200408  
M. de Jeu:
Some remarks on a proof of geometrical
PaleyWiener theorems for the Dunkl transform. 
MI 200409  
M. de Jeu:
PaleyWiener theorems for the Dunkl transform. 
