

The Mathematical Institute Newsletter is maintained
by JanHendrik 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 April 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 email to
evertse at math.leidenuniv.nl
before March 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

Inaugural lecture by Jan Hogendijk on Tuesday March 8 and seminar
on March 8
On March 8 Jan Hogendijk will give his inaugural lecture at Leiden
University. Preceding his lecture there will be three other lectures on
the theme "Mathematics across cultures" (Snellius, room 312).
11:0012:00:  
Liesbeth de Wreede (Universiteit Utrecht): "Number is the
measure of all": Snellius on the use of numbers in geometry 
12:00 1:00:  
Kim Plofker (Universiteit Utrecht and IIAS Leiden):
Heron's
formula and the geometry of quadrilaterals in Indian mathematics 
1:45 2:45:  
Karen Parshall (University of Virginia):
The British
Development of the Theory of Invariants (18411895) 

Jan Hogendijk's inaugural lecture will take place in the Academiegebouw,
Rapenburg 73, Leiden. 
4:00 5:00:  
Jan Hogendijk's inaugural lecture: Geschenken uit het
Oosten 
5:00:  
Reception 
For more information on the program, take a look at:
http://www.math.leidenuniv.nl/~jdaems/oratie.

Workshop Stochastic Systems from March 1619 at Lorentz Center
This workshop is coordinated by L. Kallenberg, G. Koole, U. Rieder and
F. Spieksma.
Further information.

General Colloquium lectures
on Thursday March 17 in Leiden and March 24 in Delft
This spring there is a cooperation between the general mathematics
colloquia of Delft and Leiden.
The following two lectures have been scheduled in March:
March 17, 4:005:00, Leiden, Snellius room 174:
Kees Oosterlee: Evaluation of European and American options with grid
stretching and accurate discretization
March 24, 4:005:00, Delft, EWIgebouw, room E, Mekelweg 4:
Sjoerd Verduyn Lunel: TBA
Forthcoming lectures: Arnold Heemink (April 14, Leiden);
Bas Edixhoven (April 21, Delft); Ben de Pagter (May 12, Leiden);
JanHendrik Evertse (May 19, Delft);
Roger Cooke (June 2, Leiden); Marcel de Jeu (June 16, Delft).
For further information see
http://www.math.leidenuniv.nl/~evertse/colloquium.shtml.

Number theory lecture by Everett Howe (CCR, San Diego) on Tuesday March 21
Title: Characterizing the zeta functions of genus 2 curves over finite fields.
Time/place: 4:00, Snellius room 401.
Guests

Guest of Peter Stevenhagen:

 Everett Howe (CCR, San Diego) from March 1922.
He will give a lecture on Tuesday March 21 (see above).
Visits/lectures outside our institute


 Bas Jansen:
On March 11, he will give a lecture, titled "Escher en het Drosteeffect"
at the Nifterlake College in Maarssen


 Rob Tijdeman:
From March 1319
he will participate in a conference on substitutions in Grenoble, France.


 Peter Stevenhagen:
On March 17 he will give a lecture for the "Natuurkundig Gezelschap te Leiden"
titled "Cryptokrommen voor de doehetzelver."


 Sara van de Geer:
From March 1418 she will be at the Helsinki National Visitors Program,
Merkrijarvi Research Station, Joensuu.
