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
(go to the homepage of the Mathematical Institute and click on "Newsletter").
There will be no newsletter
in July and August.
Copy for the newsletter of September, such as
announcements, personal notes,
visits to conferences, guests, lectures of general interest,
should be sent by e-mail to
before August 27.
To avoid any inconvenient translating or typing work,
copy should be submitted in English plaintext.
Agenda and announcements
Seminarium Recreatieve Wiskunde
June 6: Albert van der Schoot (UvA, Dept. of humanities):
De gulden snede als esthestisch ideaal: een uitvinding van de Romantiek
This lecture is from 4:00-5:00 pm in room 174.
- Drs. J.J. Goeman per September 1, 2001 with Prof.dr. S.A. van de Geer
and Prof.dr. J.C. van Houwelingen (Department of Medicine)
I'm not actually new at the Mathematical Institute, having studied
mathematics in Leiden. I started as a PhD student in statistics in September
2001 with Sara van de Geer and Hans van Houwelingen of the department of
Medical Statistics of the LUMC. My assignment is to find methods to deal
with extremely high-dimensional datasets (called microarrays) which arise in
the research of the genome. You won't often find me at the Mathematical
Institute, because my daily place of work is at the LUMC. Some other things:
I have a degree in history, which has now reduced to the status of a hobby.
I also practise photography.
The following guests from Debrecen, Hungary, will
visit Leiden in the phramework of the NWO-OTKA
program on number theory:
from July 7 to 14: Istvan Gaál,
from July 15 to August 2: Akos Pintér, Lajos Hajdú and
- Ph.D-thesis defenses
June 5, 2:15 pm:
On the Number Field Sieve Integer Factorisation Algorithm.
Promotor: Prof.dr. R. Tijdeman
Copromotor: Dr. ir. H.J.J. te Riele (CWI)
- Visits abroad
J.-H. Evertse, D. van der Laan, Sz. Tengely and R. Tijdeman will visit
the workshop "Periodicity and quasi-periodicity" in Budapest from June 10-14.
R.Tijdeman will visit Debrecen for a working visit from June 7-8.
R. Tijdeman will visit a workshop on Tilings in Paris from June 23 -July 2.
R. van der Hout will visit the University of Roma II (Tor Vergata) and the
Istituto per le Applicazioni del Calcolo "Mauro Picone" from 23-06 until
06-07. Cooperation with M. Bertsch, R. Dal Passo and E. Vilucchi; PhD
ceremony of E. Vilucchi.
- Technical reports
||Arie Hordijk and Nikolai Popov:
Large deviations analysis of a coupled processors system
||Leila Mohammadi and Sara A. van de Geer:
On nonnegative garrote estimator in a linear regression model
||K.J. in 't Hout, M.N. Spijker:
Analysis of error growth, via stability regions,
in numerical initial value problems