## News

[1 sep 2021] -
**New colleagues.** We welcome
Dhruva Kelkar, Yachen Liu, and Dion Leijnse to
our group!

[1 feb 2021] -
**PhD defense Wessel Bindt**. On February 1
Wessel Bindt,
has defended his thesis
Hyperkähler varieties and their relation to Shimura
stacks. Congratulations to Wessel!

[1 dec 2020] -
**PhD position.**
As part of my ERC project, I am hiring
PhD student.

[9 nov 2020] -
**Vidi grant for Arno Kret.**
Congratulations to
Arno Kret
for his NWO Vidi grant!

[26 aug 2020] -
**New colleagues.** We welcome
Maciej Zdanowicz,
Przemysław Grabowski, and Wouter Rienks to
our group!

[22 apr 2020] -
**ZAG Seminar.** With Ivan Cheltsov and a large number of coorganizers we are running an world-wide online
seminar:
the Zoom Algebraic Geometry Seminar.
Talks are weekly on Tuesday and Thursday, via
zoom, at flexible times. To receive
announcements and zoom passwords, subscribe the the ZAG email list
via the form at the seminar website.

[30 mar 2020] -
**Working from home.**
Due to the virus, I am working from home. I can be reached by email,
and live meetings can be scheduled using
zoom.
Note however, that my availability is limited due to parenting
obligations.

[6 jan 2020] -
**PhD and postdoc positions.**
As part of my ERC project, I am hiring
PhD students
and postdocs.
The deadline for applications is January 31.

[12 dec 2019] -
**ERC grant.** My proposal *Zeta functions and Fourier-Mukai
transforms* has been awarded an
ERC Consolidator
grant. Open positions for PhD students
and postdocs will be announced soon.

[5 dec 2019] -
**Intercity Number Theory Seminar**. Together with the
Free University (VU) we are organising an
Intercity Number Theory Seminar on Friday Dec 13. Speakers are
Lars Kühne, Joey van Langen, David Hansen, and Ilke Canakci.

[21 sep 2019] -
**Belgian-Dutch Algebraic Geometry Day**. The
17th edition
of this seminar will be held at the University of Antwerp on
November 8. The speakers are
Lie Fu (Lyon, Nijmegen),
Špela Špenko (ULB), and
Stefan Kebekus (Freiburg).

[5 jul 2019] -
**New colleages**. We welcome
Diletta Martinelli,
Emma Brakkee,
and Kees Kok, who will be joining us in September.

[21 feb 2019] -
**Belgian-Dutch Algebraic Geometry Day**. The
16th edition
of this seminar will be held at the University of Amsterdam on
June 21. The speakers are
Diletta Martinelli,
Zsolt Patakfalvi,
and
Yichao Tian (Strasbourg).

[4 feb 2019] -
**IC Number Theory Seminar and inaugural lecture of
Tim Dokchitser**. On
April 12 Tim
Dokchitser will deliver his inaugural lecture as
a part-time professor by special appointment, sponsored by
the foundation Computer
Algebra Nederland. His lecture will be preceded by an
Intercity Number Theory Seminar at Science Park.

[13 nov 2018] -
**Postdoc position**.
Ben Moonen and
I have a three year postdoc position in our joint project
*Geometry and arithmetic beyond Shimura varieties*. Deadline for
applications is 13 January 2019. See the
announcement for
more information.

[28 sep 2018] -
**Rationality of Algebraic Varieties**. From April 15 to
April 19,
Gavril Farkas,
Gerard van der Geer,
Mingmin Shen
and I will be a conference on rationality of algebraic varieties
on the island of Schiermonnikoog. See the
conference website for more information. There are only a limited number of places,
so please contact the organizers if you are interested in participating.

[1 sep 2018] -
**Belgian-Dutch Algebraic Geometry Day**. The
14th edition
of this seminar will be held
in Nijmegen on September 20 and 21. We will be celebrating
Ben Moonen's
50th birthday!

[1 sep 2018] -
**New colleagues**. We welcome
Jeroen Huijben and Zoë Schroot who will be joining us
as PhD students. Jeroen will work with
Arno Kret
and Zoë with myself and
Ben Moonen.

[1 jun 2018] -
**Vidi grant for Minming Shen**. Congratulations to
Mingmin Shen
for his NWO Vidi grant on *algebraic cycles and the
rationality problem*.

[6 apr 2018] -
**TOP grant**. NWO has awarded a TOP1 grant to
Ben Moonen and
me for the
project *Geometry and arithmetic beyond Shimura varieties*.

[14 feb 2018] -
**PhD defense Maxim Mornev**. On February 13
Maxim Mornev
has defended his thesis
Shtuka cohomology and special values of Goss
L-functions, at the University of Leiden. Congratulations
to Maxim!

[14 feb 2018] -
**Intercity Geometry Seminar**. This term
David Holmes (Leiden),
Arne Smeets (Nijmegen),
and Chris Lazda (Amsterdam) are running
an intercity seminar around mirror symmetry and moduli spaces of
Higgs bundles, following
this preprint by Groechenig, Wyss and Ziegler.
See this page
for more information.

[5 jan 2018] -
**Belgian-Dutch Algebraic Geometry Day & Grothendieck Seminar**.
The 13th
edition of the B-NL AG day will be held jointly with
the Grothendieck Seminar on March 23 in Leiden.

[27 oct 2017] -
**Intercity Number Theory Seminar**. On Nov 3
UvA and VU are jointly hosting a session of the Intercity Number Theory Seminar at the
VU.

[17 oct 2017] -
**Belgian-Dutch Algebraic Geometry Day**. The
12th
edition of this seminar takes place in Nijmegen on
December 15. The speakers are Javier Fresán,
Michael Groechenig, and Johannes Nicaise.

[24 aug 2017] -
**New colleague**. We welcome
Christopher Lazda,
who will be joining us as a postdoc per September 2017.

[1 may 2017] -
**Intercity Number Theory Seminar**. On May 19 the
UvA and VU are jointly hosting a session of the Intercity Number Theory Seminar. Speakers are
Ana Caraiani, Jeroen Sijsling, Arne Smeets, and Maxim Mornev.

[20 jan 2017] -
**PhD defense Jinbi Jin**. On January 18
Jinbi Jin succesfully defended his thesis
*Computability of the étale Euler-Poincaré characteristic*, at the University of Leiden. Congratulations to Jinbi!

[13 dec 2016] -
**Mini-workshop on arithmetic & moduli of K3 surfaces**.
On *Tuesday 31 January 2017*, we will hold a mini-workshop
on arithmetic aspects of moduli of K3 surfaces
at the University of Amsterdam.
Speakers include Anthony Várilly-Alvarado,
Martin Orr,
Alexei Skorobogatov,
Bianca Viray.
See the workshop website for the programme. Note that registration is compulsory.

[24 nov 2016] -
**Two postdoc positions available**. Two two-year
postdoc positions in number theory and algebraic geometry are available! The deadline for applications is January 5, and the intended starting date is September 1, 2017.

[20 nov 2016] -
**PhD defense Christophe Debry**. On November 15
Christophe
Debry succesfully defended his thesis
*Towards a class
number formula for Drinfeld modules*, obtaining a joint
doctorate of the University of
Amsterdam and the KU Leuven.
Congratulations to Christophe!

[29 oct 2016] -
**Joint UvA/VU Intercity Number Theory Seminar.**
On November 11 the UvA and VU will be jointly hosting
a session of the
IC
Number Theory Seminar at the VU. Speakers are
Martin Orr (Imperial College), James Lewis (U of Alberta), Chun Yin Hui (VU Amsterdam), and Wadim Zudilin (Nijmegen).

[17 oct 2016] -
**11th B-NL AG Day and Compositio Prize award on Dec 9.**
The 11th Belgian-Dutch Algebraic Geometry Day will be held on
December 9 in Amsterdam. It will coincide with the award of
the Compositio Prize award.
Lectures will be given by the authors of the three shortlisted papers:
Bhargav Bhatt,
Dieter Kotschick, Stefan Schreieder, and June Huh,
followed by the award of the prize to Bhargav Bhatt. See
this page for the programme.

[5 oct 2016] -
**Arithmetic and Algebraic Geometry Seminar.** Our
local seminar has started again. Part a study group on
crystalline cohomology, part a venue for invited speakers,
we meet on Wednesday mornings. See
here
for the programme.

[1 sep 2016] -
**New colleague.** We welcome Renjie Lyu, PhD student of
Mingmin Shen in our group.

[13 jul 2016] -
**Summer school on Vlieland.** The Berlin-Amsterdam-Leiden
graduiertenkolleg
Moduli
and Automorphic Forms is holding its annual summer school
on the island of Vlieland, from Aug 28 to Sep 2. More information
here.

[3 may 2016] -
**IC Geometry Seminar.** The final meeting of the
Intercity Geometry Seminar on rational Hodge isometries beteen
K3 surfaces will be held on May 13 in Nijmegen. The speakers are
Daniel Huybrechts,
Netan Dogra,
and Ben Moonen.

[22 apr 2016] - **Crash course
on Shimura Varieties.** June 20-22 there will be a
mini-course on Shimura Varieties in Leiden, with lectures by
Bas Edixhoven and Francesca Bergamaschi from Leiden, and Arno Kret and myself from Amsterdam.

[3 apr 2016] - **10th Belgian-Dutch Algebraic Geometry day.** We will celebrate the 10th edition of this moving seminar with lectures by Sho Tanimoto (Copenhagen), John Christan Ottem (Oslo), and Bruno Chiarellotto (Padova). See this page for more information.

[23 feb 2016] - **Inaugural lecture.** I will deliver my
inaugural lecture on Friday March 4, at 16.00, in the Oude Lutherse Kerk. It will be preceded by an
Intercity
Number Theory Seminar at the mathematics department.

[22 jan 2016] -
**IC Geometry Seminar.** Coming term we will be running an
Intercity Geometry Seminar around Buskin's proof that every
rational Hodge isometry between K3 surfaces is algebraic. The first
meeting is on February 18 in Amsterdam.

[22 jan 2016] -
**Arithmetic and Algebraic Geometry Seminar.** In the spring of 2016
we will continue our weekly local
Arithmetic and Algebraic Geometry Seminar. We will meet on Wednesdays from 16 to 17.

[17 nov 2015] -
**Belgian-Dutch Algebraic Geometry Day.**
The 9th edition of this travelling seminar will be
held in Leiden on December 11. The speakers are
David Holmes,
Clément Dupont,
Misha Verbitsky. See
this page for more information.

[8 nov 2015] -
**Frans Oort 80.** Coming week the workshop
Moduli Spaces and Arithmetic Geometry is held at the Lorentz Center
in Leiden. On Thursday 12 November there is a
Public Symposium celebrating the 80th birthday of
Frans Oort.

[21 oct 2015] -
**VU/UvA Intercity Number Theory Seminar.**
On November 6, the UvA
and VU are jointly
organising a session of the
IC
Number Theory Seminar. The speakers are
Lance Gurney,
Rob de Jeu,
Arno Kret,
and Jan Draisma.

[11 sep 2015] -
**Beijing lecture notes to appear with LMS.** The manuscript of my
Beijing lecture notes
*Sheaves and Functions Modulo p* will appear in the
*LMS Lecture Note Series*. More information on this page.

[4 sep 2015] -
**Seminar.** This term's
Arithmetic
and Algebraic Geometry Seminar is starting on September 10.
We'll have both invited speakers and a study group on
K3 surfaces and their moduli.

[1 sep 2015] -
**New colleagues.**
We welcome Wessel Bindt, Lance Gurney, and
Arno Kret
who have joined us this summer!

[1 may 2015] -
**Compositio Mathematica.**
I have joined Jochen Heinloth, Eric Opdam, and Burt Totaro
as managing editor for
*Compositio*.

[25 apr 2015] -
**VU/UvA Intercity Number Theory Seminar.**
On May 8, the UvA
and VU are jointly
organising a session of the
IC
Number Theory Seminar. The speakers are
Frits
Beukers, Ada Boralevi, Abhijit Laskar and
myself. See the
Intercity page for further details.

[25 mar 2015] - **B-NL meets NoGags.**
On June 11 and 12, the Belgian-Dutch Algebraic Geometry seminar and
the Northern German Algebraic Geometry seminar (NoGags)
will have a joint meeting in Nijmegen. See
this page for the schedule and registration.

[17 dec 2014] - **Visiting the IAS.**
From January 2015 until April 2015 I will be a *von Neumann
fellow* at the
Institute for Advanced Study.

[14 nov 2014] - **Assistant professorship.**
We are hiring an assistant professor in the algebra, geometry and mathematical physics
programme. See
this page. (Deadline for applications was January 4).

[11 sep 2014] - **Algebra and geometry seminar.**
The algebra and geometry seminar
has started. It is usually
held on Thursdays, from 16.00 to 17.00. Contact
Mingmin Shen
if you want to receive announcements of the lectures.

[31 aug 2014] - **Belgian-Dutch Algebraic Geometry Day (14 nov).**
The 7th edition of this seminar will be held in Amsterdam on 14 November. The speakers are
Minhyong Kim (Oxford),
Mingmin Shen (Amsterdam), and
Jakob Stix (Frankfurt). See
this page for more information.

[7 aug 2014] - **Postdoc position.**
A two-year postdoc position in arithmetic algebraic geometry is
available, contact Lenny Taelman for more information.

[7 aug 2014] - **VIDI grant.**
My NWO VIDI project
*Cohomological methods for function field arithmetic*
starts on September 1.

[7 aug 2014] - **New webpage.**
I moved to the University of Amsterdam, and with a new job comes a new webpage.
Comments and corrections are most welcome.