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
(go to the homepage of the Mathematical Institute and click on "Newsletter").
Copy for the March 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 February 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
Appointments for Ronald Cramer
Ronald Cramer has been elected to the Board of Directors
of the International Association of Cryptologic Research (IACR)
for the 2005-2007 term,
Ronald Cramer has been chosen as a member of "De Jonge Akademie"
("The Young Academy").
This is a program, recently established by the
KNAW (Royal Netherlands Academy of Arts and Sciences)
meant for excellent young researchers, working at Dutch universities
or institutes, who received their Ph.D.
less than ten years ago, and who have distinguished themselves by receiving
important grants or honours.
The KNAW has chosen altogether 40 scientists
(23 men and 17 women) by means of a public selection procedure
to become a member of DJA. In 2006 the number of DJA-members will
be increased to 50. A DJA-membership lasts at most five years.
The purpose of the DJA-program is
to foster interaction
between young researchers from various disciplines
working on Dutch universities or institutes, and to encourage
young researchers to develop a vision on the future of their own field
and neighbouring fields.
Each DJA-member receives an
annual traveling grant. Further, DJA organizes annual interdisciplinary
two day conferences, open to invitees only, with lectures by 10 DJA-members.
For further information (in Dutch) see
Jan Hogendijk receives award for book
The World Prize for the Book of the Year of the Islamic Republic of Iran
"The Enterprise of Science in Islam: New Perspectives", J.P. Hogendijk, A.I. Sabra, eds.,
MIT Press, Cambridge Massachusetts, 2003,
to be the best work in the field of Islamic studies
within the European-American countries.
Staff meeting and reception in honour of Bas Edixhoven's VICI-grant on
Wednesday February 9
The next staff and faculty meating will take place on February 9 from
4:00-5:00 pm in room 176. Afterwards there will be a reception
at the FOO-bar (on the ground floor near to lecture room 313) on occasion
of the recent award of a VICI-grant to Bas Edixhoven.
General Colloquium lectures
on Thursday February 10 in Delft and February 17 in Leiden
This spring there will be a cooperation between the general mathematics
colloquia of Delft and Leiden. The following people from Leiden
(in alphabetical order) have agreed to give a lecture in Delft:
Bas Edixhoven, Jan-Hendrik Evertse, Sara van de Geer, Marcel de Jeu,
Sjoerd Verduyn-Lunel. The following people from Delft (in alphabetical
order) have agreed to speak in Leiden:
Roger Cooke, Klaas Pieter Hart, Arnold Heemink, Kees Oosterlee,
Ben de Pagter. The first two lectures will be given by Sara van de Geer
(in Delft) and Klaas Pieter Hart (in Leiden).
February 10, 4:00-5:00 pm, Delft:
Sara van de Geer: Adaptive learning
February 17, 4:00-5:00, Leiden, Snellius room 174:
Klaas Pieter Hart: Embeddability of the measure algebra
For further information see
"Global and Variational Methods for ODEs and PDEs" from February 14-18
at Lorentz Center
This workshop is meant for Master's students in their final year and Ph.D.
students. Lectures are given by Jan Bouwe van den Berg, Felix Otto
(presently Stieltjes Professor), Mark Peletier and Rob van der Vorst.
The workshop is coordinated by Mark Peletier (TU Eindhoven).
Intercity Number Theory Seminar on Friday February 18
The Intercity Number Theory Seminar of February 18 is held in Leiden,
with lectures by Capi Corrales, Clemens Fuchs,
Robin de Jong and Eleonora Pellegrini.
For further information see
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).
||Liesbeth de Wreede (Universiteit Utrecht): "Number is the
measure of all": Snellius on the use of numbers in geometry
||Kim Plofker (Universiteit Utrecht and IIAS Leiden):
formula and the geometry of quadrilaterals in Indian mathematics
| 1:45- 2:45:||
||Karen Parshall (University of Virginia):
Development of the Theory of Invariants (1841-1895)
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
For more information on the program, take a look at:
New full professors
- Prof. Ronald Cramer in cryptology per June 1, 2004 (one day per week in Leiden,
four days per week at CWI)
I'd like to take this opportunity to introduce myself briefly to
those colleagues I have not met so far. My name is Ronald Cramer,
and as of June 1st 2004 I am Professor of Cryptology at the
Mathematical Institute, with an appointment of one day per week.
When not in Leiden, I lead the research group Cryptology and
Information Security at CWI in Amsterdam, also since June 1st last
My research is mainly concerned with mathematical cryptology, i.e.,
the mathematical techniques that are central to the design and
analysis of methods for digital security, such as that provided by
encryption or digital signatures.
It's a great pleasure for me to be back in Holland after having worked
abroad for 7½ years, at the ETH Zurich and the University of Aarhus.
I am not a stranger to the Mathematical Institute, as
I completed my undergraduate studies here in 1992,
with specialization "algebra, number theory, geometry."
After having completed my PhD research in cryptology at CWI at the end of
1996, I moved to ETH.
Besides research and teaching my main professional activities include
the editorial board of Journal of Cryptology, the Board of
Directors of the International Association of Cryptologic Research
(IACR) and various program committees for international conferences.
In March "De Jonge Akademie" of the KNAW will kick off, and I'm
very much looking forward to my participation.
My Cryptology course will start in the Fall.
Presently Jan Hogendijk and I share the Kloosterman room
224A. I'm here mostly on Fridays or Thursdays. Don't hesitate to
stop by, here or at CWI!
New Ph.D. students
- Christian Svensson per February 1, 2005 with Marcel de Jeu and Sergei Silvestrov (Lund)
Guests of Peter Stevenhagen:
- Eleonora Pellegrini (Pisa): During the next spring she will
visit the number theory group. She is presently a Ph.D. student
of Roberto Dvornicich. On February 18 she will give a lecture at the
Intercity Number Theory seminar.
group to work on her Ph.D. thesis with Bart de Smit.
- Capi Corrales (Madrid): As part of a sabbatical
she will visit our institute during the
next spring, starting February 12. On February 18 she will
give a lecture at the Intercity Number Theory Seminar.
Guest of Rob Tijdeman:
- Jaroslav Hancl (Ostrava):
From February 8 to March 2 he will
visit our institute and work with Rob Tijdeman in the framework
of the Socrates/Erasmus agreement.
Visits/lectures outside our institute
- Peter Stevenhagen:
On February 16 he will give an evening lecture on the "Ouderdagen 2005"
(Parents' Days 2005) titled "Getaltheorie en Bankgeheim."
- Bart de Smit and Hendrik Lenstra:
They will both give a lecture "Escher en het Droste-effect."
Bart will speak on February 16 at the Geulincx College, Faculty Club Leiden,
and Hendrik on February 25 at the Natuurkundig Gezelschap te Middelburg.
- Marcel de Jeu and Christian Svensson:
From February 14-18 they will visit the University of Lund to cooperate
with Sergei Sivestrov and Jun Tomiyama.
- Bert Peletier:
From February 25-March 5 he will be in Cambridge, Massachusetts, where he
will visit among others Boston University. There he will give a lecture
on February 28.
||M.V.S. Frasson: Symbolic computation of spectral projections and its application to neutral delay systems
||F. Spieksma: Ave, Lyapunov functions!
||C.J. van Duin. L.A. Peletier, I.S. Pop: A new class of entropy solutions of the Buckley-Leverett equation