7 September 2015  16:0017:00  Oihana Garaialde (University of the Basque Country) Cohomology of pgroups of maximal class abstract 
14 September 2015  no seminar 

21 September 2015 2 talks  14:3015:30  René Schoof (Università di Roma “Tor Vergata”) The discrete logarithm problem 
16:0017:00  Alberto Bellardini (Leuven) Picard functor and logarithmic geometry abstract  
5 October 2015  16:0017:00  Daniel Tubbenhauer (Bonn) Web calculi in representation theory abstract 
19 October 2015  no seminar  
26 October 2015  16:0017:00  Hang Xue (MPIM Bonn) GanGrossPrasad conjecture for unitary groups 
2 November 2015  no seminar  
9 November 2015  no seminar  
16 November 2015  16:0017:00  Sho Tanimoto (Copenhagen) Towards a refinement of Manin's conjecture 
23 November 2015  16:0017:00  Léo Ducas
(CWI Amsterdam) Recovering Short Generators of Principal Ideals in Cyclotomic Rings 
30 November 2015  16:0017:00  Roland van der Veen (Leiden) Algebraic curves from knots 
7 December 2015  16:0017:00  TBA TBA 
9 February 2015  16:0017:00  Arno Kret The ArthurSelberg trace formula and the geometry of Shimura varieties modulo p 
16 February 2015  16:0017:00  David Holmes (Leiden) Families of elliptic curves over bases of various dimensions 
5 March 2015 Thursday, room 407  10:00  10:45 
Yuri Bilu (Bordeaux) Special points on straight lines and hyperbolas 
11:00  11:45  Pascal Autissier (Bordeaux) Abelian varieties and the MinkowskiHlawka theorem  
13:45 
Academiegebouw, Rapenburg Leiden, PhD defense of Junjiang Liu padic decomposable form inequalities  
9 March 2015  16:0017:00  José Ignacio Burgos Gil (Madrid) Equidistribution of small points on toric varieties 
23 March 2015  16:0017:00  Christopher Daw (IHES) Heights of prespecial points of Shimura varieties 
30 March 2015  16:0017:00  Julian Lyczak (Leiden) Nodal curves on surfaces, an application of algebraic cobordism 
9 April 2015 Thursday, room B3 different day, time and place  14:4515:45  Efthymios Sofos
(MPIM Bonn) Counting rational points on smooth cubic surfaces 
13 April 2015  16:0017:00  Barinder Banwait (Essen) Tetrahedral Elliptic Curves and the localglobal principle for isogenies 
20 April 2015  16:0017:00  Arne Smeets On a monodromy trace formula for varieties over discretely valued fields 
29 April 2015 Wednesday  17:0018:00  Gabriel Zalamansky Ramification theory for inseparable coverings abstract 
30 April 2015 Thursday  14:4515:45 room 401 
Jeanine van Order
(MPIM Bonn) Dirichlet twists of GL(n)automorphic Lfunctions 
4 May 2015  16:0017:00  Daniele Turchetti Lifting Galois covers of curves: a nonArchimedean analytic approach 
11 May 2015  16:0017:00  Manolis Tzortzakis Dessins d' enfants 
26 May 2015 Tuesday 2 talks, early start  14:4515:45 room 312 
Michiel Kosters The last fall degree and an application to HFE 
16:0017:00 room 312 
Everett Howe The number of genus2 curves with nonsimple Jacobians  
1 June 2015  16:0017:00  Shanta Laishram
(New Delhi) Fibonacci numbers of the form x^{a} ± x^{b} ± 1 abstract 
8 June 2015  16:0017:00  Lars Kuehne (MPIM Bonn) Effective and uniform results of AndréOort type 
15 June 2015 2 talks  15:1516:00  Frauke Bleher (Iowa)
Ordering modules using orbit closures 
16:1517:00  Ted Chinburg (Pennsylvania) Chern classes in Iwasawa theory  
16 June 2015 Tuesday PhD defence + 3 talks  10:0011:00 Academiegebouw Rapenburg 73 
PhD defence of Santosh Nadimpalli 
13:3014:30 Snellius 412 
Santosh Nadimpalli (Orsay and Leiden) Classification of typical representations for GL_4(F)  
15:0016:00 Snellius 412 
Shaun Stevens (UEA, Norwich) On modular representations of padic classical groups  
16:1517:15 Snellius 412 
Guy Henniart (Orsay) Higher ramification theory and the local Langlands correspondence for GL(n)  
23 June 2015 Tuesday Algant graduation talks room 412  10:30  11:30  Alessandro Pezzoni On the complexity of irrational algebraic numbers 
11:30  12:30  Edoardo Lanari Compatibility of homotopy colimits and homotopy pullbacks of simplicial presheaves  
13:30  14:30  Marco Vergura A Giraudtype theorem for model topoi abstract  
14:30  15:30  Stefano Nicotra Finite dimensional pure motives abstract  
16:00  17:00  Stefan van der Lugt Arakelov intersection theory applied to torsors of semistable elliptic curves  
17:00  18:00  Sergio Zarabara An étale view of Galois Cohomology abstract 
15 September 2014  16:0017:00  René Schoof (Università di Roma “Tor Vergata”) Serre’s Uniformity Conjecture 
29 September 2014  16:0017:00  Rodolphe Richard (Universiteit Leiden) 
6 October 2014  15:30  16:30  Elisa Lorenzo (Universiteit Leiden)
Some arithmetic properties of twists of the Klein quartic (abstract) 
13 October 2014  16:0017:00  Carlo Pagano (Universiteit Leiden) There are no nonzero abelian varieties defined over Z with good reduction at every prime 
27 October 2014  16:0017:00  Pavel Solomatin (Universiteit Leiden) Curves with many points over finite fields: the classfield theory approach. 
3 November 2014  16:0017:00  Andrea Ferraguti (Universität Zürich) Qcurves, modularity and Lfunctions 
10 November 2014  16:0017:00  Miguel Grados (HU Berlin) Estimates of canonical Green’s functions (abstract) 
17 November 2014  16:0017:00  Eva Martínez (FUBerlin) The tensor product problem in Arakelov geometry 
24 November 2014  11:1512:10 room B1 (note the time and place) 
Ziyang Gao (Universiteit Leiden) The mixed AxLindemann theorem and its applications to the ZilberPink conjecture (followed by the PhD defense of the speaker at 13:45 in the city centre) 
8 December 2014  16:0017:00  Misja Steinmetz (Cambridge) Asymptotic Behaviour of the Conjugacy Probability of the Symmetric and Alternating Groups (last talk of the semester) 
23/6/2014 (Mon) Sn412(?)  10:3017:15 10:3011:15 11:3012:15 13:3014:15 14:3015:15 15:3016:15 16:3017:15 
Masters thesis presentations Niels uit de Bos: Deriving general (nonadditive) functors Raymond van Bommel: Almost all hyperelliptic Jacobians have a bad semiabelian prime Giulio Orecchia: Torsionfree rank one sheaves on a semistable curve Rosa Winter: Concurrent exceptional curves on del Pezzo surfaces of degree one Andrea Pasquali: Representations of SL_{2} and GL_{2} in defining characteristic Riccardo Ferrario: Galois closures for monogenic degree4 extensions of rings 
2/6/2014 (Mon)  16:0017:00  Dijana Kreso (Graz) Rational function decomposition and Diophantine equations 
26/5/2014 (Mon)  16:0017:00  Ziyang Gao (Orsay/Leiden) The AxLindemann theorem for the universal family of abelian varieties 
22/5/2014 (Thu)  11:0012:00 Sn 412? 
Daniel Loughran (Hannover) Good reduction of complete intersections 
19/5/2014 (Mon)  17:0018:00  Jon Gonzalez Sanchez (Bilbao) From pgroups to prop groups and back 
19/5/2014 (Mon)  15:4516:45  Mima Stanojkovski (Leiden) Evolving groups and intensity 
14/4/2014 (Mon)  16:0017:00  Rostislav Devyatov (BerlinLeiden) Equivariant infinitesimal deformations of a special class of threedimensional Tvarieties 
8/4/2014 (Tue)  14:1516:00 Sn 412 
Jan Bouw (Leiden) An algorithm to compute norm residue symbols 
24/3/2014 (Mon)  16:0017:00  Niels Lindner (BerlinLeiden) Density of quasismooth hypersurfaces in simplicial toric varieties 
17/3/2014 (Mon)  16:0017:00  Giulia Battiston (BerlinLeiden) The monodromy of stratified bundles in positive characteristic 
10/3/2014 (Mon)  16:0017:00  Owen Biesel (Leiden) A New Definition of Discriminant Algebra 
6/3/2014 (Thu)  16:0017:00  Elmar Grosse Klönne (Berlin) A partial generalization of Colmez' functor 
3/3/2014 (Mon)  16:0017:00  Dirk Basson (Leiden) Drinfeld modular forms of higher rank 
10/2/2014 (Mon)  16:0017:00  José Ignacio Burgos Gil (Madrid) The singularities of the invariant metric of the sheaf of Jacobi forms on the universal elliptic curve. 
25/11/2013 (Mon)  16:0017:00  Rachel Newton (Bonn) Computing transcendental Brauer groups of products of CM elliptic curves 
21/11/2013 (Thu)  16:0017:00 Sn 312 
Guillermo Mantilla (Lausanne) Weak arithmetic equivalence of number fields 
18/11/2013 (Mon)  16:0017:00 B03 
Ekaterina Amerik (Moscow, Paris) Some remarks about the dynamical Hasse principle 
11/11/2013 (Mon)  16:0017:00  Sorina Ionica (Paris) Isogeny graphs with real multiplication 
4/11/2013 (Mon)  16:0017:00  Marco Streng (Leiden) Computing endomorphism rings of abelian varieties using class groups (joint work with Gaetan Bisson) 
24/10/2013 (Thu)  15:4516:45 Sn 312 
Gabor Wiese (Luxembourg) On Galois representations and the Inverse Galois Problem 
14/10/2013 (Mon)  16:0017:00  Markus Perling (Bielefeld) Exceptional collections on (rational) surfaces 
7/10/2013 (Mon)  16:0017:00  David Holmes (Leiden) Rational points on Kummer varieties and ranks of elliptic curves 
19/9/2013 (Thu)  11:0012:00 (!) Sn B3 
Martin Bright (Beirut) Brauer groups of singular del Pezzo surfaces 
16/9/2013 (Mon)  16:0017:00  Tzanko Matev (Bayreuth) Algebraic dependencies of the multiplicative group 
18/2/2013 (Mon)  16:0017:00  David Holmes (Leiden) Distribution of rational points on Kummer varieties 
4/3/2013 (Mon)  16:0017:00  Owen Biesel (Princeton) Gclosures for ring extensions 
7/3/2013  16:0017:00  Cecília Salgado (Universidade Federal do Rio de Janeiro) Unirationality of del Pezzo surfaces of degree two 
14/3/2013  16:0017:00  Alex Bartel (Warwick University) The difference between rational representations and permutation representations of a finite group 
18/3/2013 (Mon)  16:0017:00  Hendrik Lenstra (Leiden) Lattices with symmetry, I 
21/3/2013  15:4517:30  Hendrik Lenstra (Leiden) Lattices with symmetry, II 
25/3/2013 (Mon)  16:0017:00  Jan Steffen Müller (Hamburg) Canonical heights on Jacobians of hyperelliptic curves 
28/3/2013  16:0017:00  No seminar, but colloquium 
11/4/2013  16:0017:00  No seminar, but colloquium 
18/4/2013  16:0017:00  No seminar, but colloquium 
8/5/2013 (Wed)  16:0017:00  Kloosterman lecture 
13/5/2013 (Mon)  16:0018:00 16:0016:50 17:1018:00 
Algant predefense (Duong Hoang Dung defends his PhD thesis on May 14) Andrea Lucchini (Padova): Boundedly generated subgroups of finite groups Christopher Voll (Bielefeld): Zeta functions of groups and rings 
16/5/2013  16:0017:00  Paloma Bengoechea (Collège de France) From quadratic polynomials and continued fractions to modular forms 
25/6/2013 (Tue) Sn 402  13:4514:45 15:1516:15 16:3017:30 
Olivier Wittenberg (ENS Paris, CNRS) On the cycle class map for zerocycles over local fields Jinbi Jin (Leiden): Classification of torsors over curves David Madore (ENST Paris): ChurchTuring computability of étale cohomology 
26/6/2013 (Wed) Sn 402  15:0017:15  Bhargav Bhatt (IAS Princeton) Crystalline and de Rham cohomology 1 & 2 
3/7/2013 (Wed) Sn 402  15:0017:15  Bhargav Bhatt (IAS Princeton) Crystalline and de Rham cohomology 3 & 4 
4/7/2013  16:0017:00  Wei Ho (Columbia) Families of latticepolarized K3 surfaces 
Lectures take place on Mondays from 16:00 to 17:00 in room Sn401, unless mentioned otherwise.
3/12/2012  Hendrik Lenstra (Leiden) Finding idempotents and torsion units in orders 
19/11/2012  Cédric Pépin (Leuven) Perspectives on the duality for Néron models of abelian varieties 
5/11/2012  Heer Zhao (Cambridge) Degeneration of Abelian Varieties over Complete DVR 
22/10/2012  Rachel Newton (Leiden) Realising the cupproduct of local Tate duality 
15/10/2012  Julio Brau (Leiden) Growth of pSelmer groups of elliptic curves in pextensions 
8/10/2012  Fernando Rodriguez Villegas (ICTP Trieste) Hypergeometric motives 
1/10/2012  David Holmes (Leiden) NéronTate heights and Arakelov theory 
24/09/2012  Christophe Debry (Leuven/Leiden) A division polynomial condition for supersingularity 
17/09/2012  Alice Silverberg (UC Irvine) A lattice algorithm of Gentry and Szydlo 
Lectures take place on Mondays from 16:00 to 17:00 in room Sn403, unless mentioned otherwise. The seminar is preceded by a study group on moduli of elliptic curves.
Wed 13/6/2012 16:00, Sn401 
Ted Chinburg (Philadelphia) Self dual codes, number theory and topology 
21/5/2012  Federico Pellarin (St.Etienne) On the values of Goss' zeta function 
14/5/2012  James Sellers (Penn State) Unique Path Partitions: Characterization and Congruences 
7/5/2012  Sean Howe (Leiden) Higher genus counterexamples to the "naive" relative ManinMumford conjecture 
23/4/2012  Niels Lubbes (Linz) Families of circles on real surfaces 
2/4/2012  Michiel Kosters (Leiden) Determining Sunits of an order in a quaternion algebra 
12/3/2012  Raf Cluckers (Lille/Leuven) Transfer principles for motivic integrals and their applications in the Langlands program 
5/3/2012  Matthieu Romagny (Jussieu) Reduction at p of coverings of curves of higher genus 
27/2/2012  René Pannekoek (Leiden) On padic density of rational points on K3 surfaces 
13/2/2012  Alberto Gioia (Leiden) Universal homeomorphisms and Galois theory 
Wed 8/2/2012 14:00, Sn402 
Alexei Skorobogatov (Imperial College) Towards calculating the transcendental Brauer group 
Lectures take place on Mondays from 16:00 to 17:00 in room Sn402, unless mentioned otherwise
Tue 3/1/2012 16:0017:00 
Arno Kret (Orsay) The basic stratum of some onedimensional Shimura varieties 
19/12/2011  Jinbi Jin (Leiden) Point counting formulae on universal elliptic curves 
21/11/2011 16:0017:00 
Mark Watkins (Sydney) Indefinite LLL and solving quadratic equations 
21/11/2011 17:0018:00 
Hendrik Lenstra (Leiden) Discriminants of wild extensions II 
14/11/2011  Daniel Ferrand (Rennes/Jussieu) Norm and corestriction 
7/11/2011  Peter Jossen (Orsay) TateShafarevich groups whose finiteness implies Leopoldt's conjecture 
31/10/2011 16:1517:15 
Hendrik Lenstra (Leiden) Discriminants of wild extensions 
24/10/2011  Bas Edixhoven (Leiden) Gauss's theorem on sums of three squares via group schemes 
26/9/2011  Rob Eggermont (Leiden) Witt rings and their applications to the theorem of BrauerNesbitt  (abstract) 
12/9/2011 16:0017:45 
Alberto Facchini (Padova) Semilocal categories 
Lectures take place on Mondays from 14:30 to 15:30 in room Sn312, unless mentioned otherwise
Tue 31/5/2011 14:30, Sn403 
Hendrik Lenstra (Leiden) Field topologies on unions of finite fields 
2/5/2011  Bruno Anglès (Caen) On the derivative of certain Artin Lfunctions in characteristic p 
18/4/2011  Mihran Papikian (Penn State) Elliptic sheaves and odd Jacobians 
21/3/2011 15:45, Sn401 
Nils Bruin (Simon Fraser University) On primes p with class number of Q(\sqrt{4p}) divisible by 16 
7/3/2011  Ambrus Pál
(Imperial College) Rational points and homotopy theory 
8/2/2011 16:00, Sn405 
Eduardo Esteves (IMPA) The class of stable hyperelliptic curves of genus 3 
Lectures take place on Wednesdays from 16:00 to 17:00 in room Sn402.
19/1/2011  Chris Peters (Grenoble) Abelian varieties as invariants for Riemannian manifolds (2) 
5/1/2011  Chris Peters (Grenoble) Abelian varieties as invariants for Riemannian manifolds (1) 
15/12/2010  Johannes Nicaise (Leuven) Rational fixed points for finite group actions, and a question of Serre 
8/12/2010  Alberto Gioia (Leiden) Bhargava's Galois closure 
1/12/2010  Joost Michielsen (Leiden) Lfunctions of the projective line 
24/11/2010  Julio Brau (Leiden) Computing the image of Galois representations attached to elliptic curves 
10/11/2010  Sara AriasdeReyna (IEM Essen) On the torsion part of the MordellWeil group of abelian varieties over finitely generated fields Andrea Siviero (Bordeaux) On Realizable Classes 
3/11/2010  Filip Najman (Leiden, Zagreb) MordellWeil groups of elliptic curves over quadratic fields 
13/10/2010  Lenny Taelman (Leiden) Number of solutions modulo p^n 
6/10/2010  Samuele Anni (Leiden) Modular modular Galois representations 
29/9/2010  Hendrik Lenstra (Leiden) Division points of multiplicative groups 