lt

Office

Snellius, Sn233
[ map ]

Phone

+31 71 527 7133

E-mail

lenny@math.leidenuniv.nl

Mailing address

Mathematisch Instituut
P.O. Box 9512
2300 RA Leiden
The Netherlands

Position

Assistant professor at the Mathematical Institute of the University of Leiden. Here is my cv.

Spring 2014

In the spring of 2014 I coordinate the bachelor seminar and teach topology.

Activities

I am organizing the Dutch Intercity number theory seminar. Wouter Zomervrucht is coordinating the seminar on coherent cohomology.
Recent activities include the department colloquium our local algebra seminar, a reading group on the Weil conjectures for K3s, a workshop on zeta functions in positive characteristic and a conference on arithmetic geometry.

Graduate students

Maxim Mornev, Christophe Debry, Jinbi Jin, Alberto Gioia (thesis, 2013).

Research interests

Number theory, arithmetic geometry, function fields, t-motives, Drinfeld modules.

Publications

Sheaves and functions modulo p, lectures on the Woods-Hole trace formula.
lecture notes, preprint (2014) - [ pdf ]

(with B. Anglès) Arithmetic of characteristic p special L-values (with an appendix by V. Bosser).
preprint (2012) - [ arxiv ]

(with B. Anglès) On a problem à la Kummer-Vandiver for function fields.
J. Number Theory 133 (2013) - [ journal | arXiv | addendum ]

A Herbrand-Ribet theorem for function fields.
Invent. Math. 188 (2012) - [ journal | arXiv ]

The Carlitz shtuka.
J. Number Theory 131 (2011) - [ journal | arXiv ]

Special L-values of Drinfeld modules.
Ann. of Math. 175 (2012) - [ journal | arXiv ]

A Dirichlet unit theorem for Drinfeld modules.
Math. Ann. 348 (2010) - [ journal | arXiv ]

1-t-motifs.
to appear in the proceedings of a Banff workshop. - [ arXiv ]

Special L-values of t-motives: a conjecture.
Int. Math. Res. Not. (2009) - [ journal | arXiv | magma code ]

Artin t-motifs.
J. Number Theory 129 (2009) - [ journal | arXiv ]

On t-Motifs.
PhD thesis, Groningen (2007) - [ online version ]

(with M. van der Put) Local p-adic differential equations.
p-adic mathematical physics, AIP Conf. Proc., 826, 2006.

Dieudonné determinants for skew polynomial rings.
J. Algebra Appl. (2006) - [ journal | arXiv ]

(with J. Bosman) On sums of sums of values of Dirichlet characters.
Nieuw Arch. Wiskd. (2001) - [ journal ]