GADEPs
Geometry, Arithmetic and Differential Equations of Periods (GADEPs)
Fridays 10:30 (Rio de Janeiro's time)
Organizers: Hossein Movasati, Younes Nikdelan
Invited Organizer: Roberto Villaflor (07/2022-11/2022)
Past invited organizers: Tiago Fonseca (02/2021-11/2021), Roberto Villaflor (03/2022-06/2022), Jin Cao (03/2023-07/2023)
M. Picard a donné à ces integrales le nom de périodes; je ne saurais
l'en blâmer puisque cette dénomination lui a permis d'exprimer dans un
langage plus concis les intéressants résultats auxquels il est parvenu.
Mais je crois qu'il serait fâcheux qu'elle s'introduisit définitivement dans
la science et qu'elle serait propre à engendrer de nombreuses confusions,
H. Poincaré's remarks on the name period used for integrals, Acta Mathematica, 1887 page 323.
This seminar is about all confusions around periods (a bad but already established name).
The talks are available in the YouTube Channel
GADEPs.
meet.google.com/hzq-vads-ntx
(you might need a gmail related account)
2024
- 28 June 2024:
- 21 June 2024:
- 14 June 2024: No talk.
- 07 June 2024: Joshua Lam (Humboldt University, Germany)
*
- 31 May 2024: Daniel Litt (University of Toronto, Canada)
*
- 24 May 2024: Kiyokazu Nagatomo (Osaka, Japan)
*
- 17 May 2024: (,)
*
- 10 May 2024: Chin-Lung Wang(NTU, Taiwan)
*
- 03 May 2024: (,)
*
- 26 April 2024:
Periods in Physics
- 19 April 2024: (,)
*
- 12 April 2024: (,)
*
- 05 April 2024: Fernando Contreras(IMPA, Brazil)
*
- 29 March 2024: Sexta-feira Santa
- 22 March 2024:Evgeny Ferapontov (Loughborough University, UK)
Differential equations for modular forms and Jacobi forms
- 15 March 2024: Hossein Movasati: (IMPA, Brazil)
Introduction of reading and research seminar Differential Equations and Arithmetic
- 23 February 2024: Felipe Espreafico Ramos (IMPA, Brazil). Felipe's defense
Modularity and Enumerative Geometry of Physical Invariants
- 21,22 February 2024: Tiago Fonseca(UNICAMP, Brazil),
Two lectures on differential equations and arithmetic: 1-equations from geometry 2-transcendence
- 16 February 2024: Wodson Mendson(UFF, Brazil)
Foliations in positive characteristic
- 09 February 2024: Carnaval
*
- 02 February 2024: Hossein Movasati(IMPA, Brazil)
Katz-Grothendieck conjecture
- 26 January 2024: Benjamin Bakker(UIC,USA)
Algebraicity of Shafarevich maps
- 19 January 2024: Remke Kloosterman (Università degli Studi di Padova, Italy)
Hodge loci of linear combinations of linear subvarieties
- 12 January 2024: Cezar Lupu(BIMSA, China)
Multiple zeta values: from arithmetic to geometry and physics
- 05 January 2024: Moises Herradon Cueto (UAM, Spain)
Hodge theory of abelian covers of algebraic varieties
2023
- 24 November 2023: Giada Grossi (Paris 13, France)
Elliptic curves in p-adic towers: an introduction to Iwasawa theory
- 17 November 2023: Radu Laza (Stony Brook, USA)
Higher rational and higher Du Bois singularities and applications
- 10 November 2023: Cezar Lupu(BIMSA, China) Postponed!.
- 03 November 2023: Matthias Paulsen (Uni. Marburg, Germany)
The degree of algebraic cycles on hypersurfacesa
slides
- 27 October 2023: Anneloes Viergever (Universität Duisburg-Essen, Germany)
The quadratic Euler characteristic of a smooth projective same-degree complete intersection.
Here are the slides
- 20 October 2023: Lisa Marquand (Courant Institute of Mathematical sciences at NYU, USA)
Finite groups of symplectic birational transformations of manifolds of OG10 type
Here are the slides
- 13 October 2023: Marc N. Levine (Universität Duisburg-Essen, Germany),
Quadratic Donaldson-Thomas invariants for spin threefolds
- 06 October 2023: Jethro van Ekeren (IMPA, Brasil)
Hodge, Poisson and Ramanujan in the context of chiral homology
- 29 September 2023: Felipe Espreafico (IMPA, Brazil)
The real, the motivic and the arithmetic
- 22 September 2023: Haohua Deng (Duke university, USA)
Space of nilpotent orbits and extension of period mappings
- 15 September 2023: Yilong Zhang (Purdue university, USA)
Periods of Cubic Surfaces
- 08 September 2023: Holiday (*, *)
*
- 01 September 2023: Elizabeth Gasparim (Universidad Católica del Norte, Chile)
Homological Mirror Symmetry for Adjoint Orbits
- 21-25 August 2023:
GADEPs focused conference III: Noether-Lefschetz and Hodge loci
GADEPs' Problem
No. 1
- 18 August 2023: * (*, *)
Quartic fourfolds II
- 11 August 2023: * (*, *)
Quartic fourfolds I
-
July 2022: Break between two semesters.
- 23 June 2023: Hossein Movasati, The most longstanding contradiction of my career
- 16 June 2023: Jin Cao, Quasi Jacobi forms
- 09 June 2023: Roberto Villaflor, Periods and twisted cubics
- 02 June 2023: Younes Nikdelan, Differential equations and modular forms
- 26 May 2023: Felipe Espreafico,
Motivic and Arithmetic DT invariants for the Hilbert Scheme of Points in A^3
- 19 May 2023: Informal discussion
- 07-12 May 2023:
GADEPs focused conference II: Periods of Calabi-Yau varieties and Gromov-Witten invariants
For the web page hosted by BIMSA see
GADEPs focused conference II
- 05 May 2023: Informal discussion: Self-similar integrals/periods
- 28 April 2023: Informal discussion: Borwein integrals
- 21 April 2023: Break
- 14 April 2023: Ilia Zharkov (KSU, USA)
Tropical Hodge conjecture for Abelian varieties.
- 07 April 2023: Andrey Soldatenkov (IMPA, Brazil)
Absolute Hodge classes and the Mumford-Tate conjecture for hyperkähler manifolds
- 31 March 2023:
Informal discussion about a Veronese algebraic cycle for cubic 6-folds.
- 24 March 2023: François Greer (Michigan State University, USA)
Quasi-modularity of Hodge cycles
- 17 March 2023: Emenuel Scheidegger (BICMR, China)
On attractor points on the moduli space of Calabi-Yau threefolds
- 10 March 2023: * (*, *)
*
-
Break between two semester
- 24 February 2023: Carnaval
- 17 February 2023: Richard Thomas(Imperial College, UK) Special Talk
Nodes and the Hodge conjecture
- 10 February 2023: Jorge Duque (Uni. Chile, Chile), Second order invariant of the IVHS associated to the Hodge
locus
- 03 February 2023: Jin Cao (Tsinghua univerisity, China), On Richard Thomas' article.
- 27 January 2023: Roberto Villaflor (Uni. Católica, Chile), Main conjecture for tangent spaces.
- 20 January 2023: Hossein Movasati (IMPA, Brazil)
On a Hodge locus II
- 13 January 2023: Hossein Movasati (IMPA, Brazil)
On a Hodge locus I
- 06 January 2023: Informal meeting
2022
- 18 November 2022: Felipe Espreafico (IMPA and Uni. Heidelberg)
Atyiah-Bott formula and Refined Enumerative Geometry
- 30 September 2022: Robert Roussarie (Univ. Bourgogne, France)
Conversation with Robert Roussarie
This will be part of
GADEPs focused conference: Abelian and iterated integrals and Hilbert 16th problem
- 23 September 2022: Haluk Sengun (Sheffield University, UK)
Periods of Bianchi modular forms
- 16 September 2022: Jiangtao Li(Chines Academy of Sciences,China)
Realizations of double shuffle relations
- 09 September 2022: Adrian Langer (MIMUV, Poland)
Non-abelian Hodge theory in positive characteristic and its applications
- 02 September 2022: Paola Comparin(Universidad de la Frontera UFRO, Chile)
CENCELED
- 26 August 2022: Jerson Caro (PUC, Chile)
Some advances in a conjecture of Watkins
- 19 August 2022: Michela Artebani (Universidad de Concepción, Chile)
Cox rings of K3 surfaces.
- 12 August 2022: Daniel Lopez (IMPA, Brazil)
Monodromy problem and Tangential center-focus problem for product of generic lines in $\mathbb{P}^2$
- 05 August 2022: Amin Gholampour(Univ. of Maryland, US)
2-dimensional stable pairs on 4-folds
-
01, 08, 15, 22, 29 July 2022: Break between two semesters.
- 24 June 2022: Gabriele Bogo (TU Darmstadt, Germany)
Ramanujan systems associated to hyperbolic triangles
- 17 June 2022: Martin Vogrin(JGU Mainz, Germany)
Constructing quantum K-theory invariants of Calabi-Yau manifolds
- 10 June 2022: Ignacio Barros Reyes (Université Paris-Saclay, France)
On the irrationality of moduli spaces
- 03 June 2022: Sebastian Eterovic (Berkeley, US)
Generic Solutions to Equations Involving the Modular j-Function
- 27 May 2022: Anita Maria Rojas Rodriguez (Universidade de Chile, Chile)
Period matrices
- 20 May 2022: Luis Alberto Lomeli (PUCV, Chile)
L-functions and representations of p-adic groups under the Kazhdan transfer between close local fields
- 13 May 2022: Jan-Willem van Ittersum (MPIM Bonn, Germany)
Shifted symmetric functions, quasimodular forms and Hamiltonian operators
- 06 May 2022: Sebastián Olano (University of Michigan)
Weighted Hodge ideals
- 29 April 2022: Robert Frederick Auffarth (Universidade de Chile, Chile)
The Schottky Problem and secants of the Kummer variety
- 22 April 2022: * (*, *)
* A very late carnival
- 15 April 2022: Sebastián Herrero (PUCV, Valparaíso, Chile)
p-adic asymptotic distribution of CM points
Slides
- 08 April 2022: Yves Martin (Universidade de Chile, Chile)
Non-vanishing of Fourier coefficients of Siegel cusp forms
- 01 April 2022: Pedro Montero Silva (UTFSM, Valparaíso, Chile)
Intermediate Jacobians and Automorphisms of smooth hypersurfaces of the projective space
Slides
- 25 March 2022: Younes Nikdelan (UERJ, Brazil)
About Ramanujan-Rankin-Cohen systems, sl_2(C)-Lie algebras and Hypergeometric differential equations
- 18 March 2022: Felipe Ramos (IMPA, Brazil)
Gauss Manin Connection in Disguise: Mirror Quintic Threefolds with two rational curves
- 11 March 2022: Jorge Duque (Universidad de Antioquia, Colombia)
On fake linear cycles inside Fermat varieties.
- 04 March 2022: Hossein Movasati (IMPA, Brazil)
Holomorphic foliations with a center singularity
2021
- 26 November 2021: Paloma Bengoechea (ETHZ, Switzerland)
Cycle integrals of modular functions and continued fractions
- 19 November 2021: Cristiana Bertolin (Torino, Italy).
Grothendieck period conjecture and 1-motives
- 12 Novembro 2021: Jorge Vitório Pereira (IMPA, Brazil).
On the formal principle for curves on projective spaces
- 05 November 2021: Ananyo Dan (University of Sheffield, UK).
Topological and geometric obstruction to deformation of divisors
- 29 October 2021: Mingmin Shen (University of Amsterdam, Netherlands).
Some counter examples to the integral Hodge conjecture
- 22 October 2021: Georg Oberdieck (Bonn University, Germany).
On Chern numbers of Hilbert schemes of points on K3 surfaces and some applications
- 15 October 2021: Payman Eskandari (Toronto, Canada).
Mixed motives with large unipotent radicals
- 08 October 2021: Henrik Bachmann(Nagoya, Japan).
Finite multiple zeta values
- 01 October 2021: Johannes Walcher (Heidelberg, Germany).
On the rationality of MUMs and 2-functions
- 24 September 2021: Carlos Simpson (Nice University, France).
A twistor space for moduli of logarithmic connections of rank 2 on an open curve ,
Slides
- 17 September 2021: Pierre Vanhove (Institut de Physique Theorique, France).
Feynman integrals and period integrals ,
- 10 September 2021: Nikolaos Diamantis (Nottingham, UK).
L-series associated with harmonic Maass forms ,
Slides
- 03 September 2021: Maria Gioia Cifani (Università di Roma 3, Italy).
Reconstructing curves from their Hodge classes
- 27 August 2021: Riccardo Pengo (ENS Lyon, France).
Mahler measures, special values and exactness: a periodic journey ,
Slides
- 20 August 2021: Frank Loray (University of Rennes, France).
Some transcendance problems in Painleve equations
- 13 August 2021: Ambrus Pal (Imperial College London, UK).
Multiplicative periods of classical motives over function fields
-
02, 09, 16, 23, 30 July, 06 August 2021: Break between two semesters.
- 25 June 2021: Pieter Moree (MPIM Bonn, Germany).
Euler-Kronecker constants and cusp forms
- 18 June 2021: Salomón Rebollo Perdomo (Universidad del Bío-Bío, Chile).
Abelian integrals for trivial global monodromy polynomials
- 11 June 2021: Bryce Kerr (MPIM, Bonn).
Energies of modular roots
- 04 June 2021: .
Between two holidays is holiday!!!!
- 28 May 2021: Bruno Klingler (Humboldt Universität, Germany).
On the geometry of the Hodge locus
- 21 May 2021: Simon Pepin Lehalleur (Radboud University, Netherlands).
Exponential periods and exponential Voevodsky motives
Will start exceptionally at 11:30(Rio)
- 14 May 2021: Babak Haghighat (Tsinghua university, China).
Hypergeometric functions in physics
Cancelled
- 07 May 2021: Yohan Brunebarbe (CNRS, Bordeaux) .
Increasing hyperbolicity of varieties supporting a variation of Hodge
structures with level structures
- 30 April 2021: Clément Dupont (Université de Montpellier, France).
Single-valued periods
- 23 April 2021: Holiday(São Jorge).
- 16 April 2021: Federico Zerbini (IPhT Paris-Saclay).
The periods of string theory amplitudes
- 09 April 2021: Sergei Yakovenko (Weizmann Institute, Israel).
How transcendental are Periods?
- 02 April 2021: Holiday (Sexta feira Santa).
- 26 March 2021: Andreas Braun (Durham, UK).
String Vacua, Geometry, and Arithmetic
- 19 March 2021: Ma Luo (Oxford, UK) .
Periods and completions of fundamental groups
- 12 March 2021: Giuseppe Ancona (Université de Strasbourg, France).
The standard conjecture of Hodge type for abelian fourfolds
- 05 March 2021: Vacation between summer school and March-June semester.
- 26 February 2021: Gabriele Bogo (Darmstadt, Germany)
Extended modularity and deformation of Riemann surfaces
- 19 February 2021 :
Conversa com Alcides Lins Neto
- 12 February 2021(): Julien Roques (Lyon, France)
Hypergeometric mirror maps
- 05 February 2021: Joseph Ayoub (University of Zurich, Switzerland)
A new Weil cohomology in characteristic $p$ and a ring of $p$-adic periods
- 29 January 2021: Nils Matthes (Oxford, UK)
The de Rham fundamental group of a once-punctured elliptic curve
- 22 January 2021:
Interview with S. T. Yau
See also the recent interview recent interview
- 15 January 2021: Tiago Fonseca (Oxford, UK)
Periods and Poincaré series
- 08 January 2021: An informal meeting about the future of GADEPs
2020
- 27 November 2020: Claus Hertling (Mannheim, Germany)
Periods and a Torelli conjecture for isolated hypersurface singularities
- 20 November 2020:
Conversation with César Camacho , see also this interview
- 13 November 2020: Javier Fresán (École polytechnique, France):
E-functions and (hyper)geometry
- 06 November 2020: Masha Vlasenko, (IMPAN, Poland):
Frobenius constants of differential equations
- 30 October 2020: Ursula Whitcher (Mathematical Reviews AMS, US)
High Picard rank K3 surfaces, Hasse-Witt matrices, and hypergeometric functions
- 23 October 2020: Murad Alim (Hamburg, Germany):
Mirror symmetry and Jacobi forms
- 16 October 2020: Laure Flapan(MSU, USA):
Period integrals and Hodge modules
- 09 October 2020:
Interview with Michel Waldschmidt
see this lecture for a beautiful exposition by Waldschmidt.
- 02 October 2020:
Interview with Yulij Ilyashenko
See this lecture for an excellent expository/historical talk by Ilyashenko .
- 25 September 2020: François Charles (Université Paris-Sud ):
Geometry of numbers in infinite rank and diophantine applications
- 18 September 2020: Jeroen Sijsling (Universität Ulm, Germany):
Arithmetic Fuchsian groups and canonical models
- 11 September 2020: Per Berglund (University of New Hampshire, US):
TBA CANCELLED
- 04 September 2020: Frits Beukers (Utrecht University, Netherlands):
Periods and Dwork’s congruences
- 28 August 2020: Gal Binyamini (Weizmann Institute, Israel):
Point counting for foliations over number fields and Diophantine applications
- 21 August 2020: Alex Degtyarev (Bilkent University, Turkey):
Counting 2-planes in cubic 4-folds in P^5
- 14 August 2020: Andrew Harder (Lehigh University, US):
Calabi-Yau threefolds fibered by K3 surfaces and their internal Picard-Fuchs equation
- 07 August 2020: Adrian Clingher (UMSL, US):
On K3 Surfaces of High Picard Rank ,
Slides
- 31 July 2020: Jorge Duque (IMPA):
Hodge cycles and Gauss hypergeometric function
- 24 July 2020: Saiei Matsubara (Kobe, Japan):
Signature of the monodromy invariant hermitian form of GKZ system
- 17 July 2020: Emre Sertoz (Hannover, Germany):
Separating periods of quartic surfaces
- 10 July 2020: Ruben Lizarbe(Renne, UERJ):
Affine and projective structures on varieties
- 03 July 2020: Lubomir Gavrilov(Toulouse, France):
The bifurcation theory of quadratic isochronous centers revisited
- 26 June 2020: Javier Gargiulo(IMPA):
Rational pull-backs of toric foliations
This talk will start at 10:00!!!
- 19 June 2020: Daniel Lopez(IMPA):
Homology supported in Lagrangian submanifolds in mirror quintic threefolds
- 12 June 2020: Roberto Vilaflor(IMPA):
Small codimension components of the Hodge locus and periods of
the Fermat variety
- 05 June 2020: Younes Nikdelan(UERJ):
Rankin-Cohen bracket for Calabi-Yau modular forms
- 29 May 2020: Hossein Movasati(IMPA):
Linear differential equations with finite monodromy