Didier Lesesvre

  • Cursus Studiorum

2018 – 2021 Postdoctoral fellowship, Sun Yat-Sen University, Zhuhai, China.
2014 – 2018 PhD in Mathematics, adivsor : Farrell Brumley, Université Paris 13.
Arithmetic Statistics on Quaternion Algebras
Jury : V. Blomer, G. Chenevier, G. Harcos, P. Michel, J. Tilouine
2011 – 2014 MSc in Mathematics, ENS Cachan and UPMC.
research internship with Farrell Brumley on the Jacquet-Langlands correspondence
2011 – 2017 MA in History and Philosophy of Sciences, Université Paris 7.
research internship with Renaud Chorlay around the philosophy of definitions
2012 – 2013 Agrégation in Mathematics (ranked 10th).

  • Long Research Stays

2017 – 2018 Georg-August Universität, Göttingen, 1 year.
local advisor : Valentin Blomer
funded by Deutscher Akademischer Austauschdienst (DAAD)
Winter 16-17 EPFL, Lausanne, 4 months.
local collaborators : Ian Petrow and Ernest Hunter Brooks
funded by Fondation Sciences Mathématiques de Paris (FSMP)

  • Thematic Schools

August 2018 Automorphic forms, L-functions and moments, Nesin, Turkey.
July 2018 Building Bridges in Automorphic forms, Alfréd Rényi Institute, Budapest.
June 2018 L-functions : Open Problems and Current Methods, HCM, Bonn.
March 2018 Locally symmetric spaces, IAS, Princeton.
Sept 2017 Automorphic Forms and Arithmetic, MFO, Oberwolfach.
July 2017 Arithmetic Days, Caen.
Feb 2017 Analytic Number Theory, MSRI, Berkeley.
June 2016 EJCTN, Université Blaise Pascal, Clermont-Ferrand.
May 2016 Relative Trace Formula, L-functions, Harmonic Analysis, CIRM, Luminy.
March 2016 Geometrization and Algebraization of the Langlands Program, Bristol.
July 2015 Quantum Ergodicity and Harmonic Analysis, Marburg Universität.
April 2015 Analytic Aspects of Number Theory, ETH, Zürich.
July 2014 Analytic Number Theory, IHÉS, Bures-sur-Yvettes.
August 2011 Representation Theory and Complex Analysis, SMI, Perugia.

  • Scientific Talks

Jul 2018 EU/US Workshop, Budapest, Hungary.
Arithmetic Statistics for quaternion algebras
Jul 2018 Number theory seminar, Mainz University.
Plancherel and Sato-Tate for quaternion algebras
Jun 2018 Number theory seminar, Université Paris 13.
Type of symmetry of the quaternion algebras
May 2018 PhD Defense, Université Paris 13.
Arithmetic Statistics for quaternion algebras
May 2018 Number theory seminar, MPIM, Bonn.
Type of symmetry of the quaternion algebras
Apr 2018 Oberseminar, Göttingen.
Low-lying zeros of L-functions
Nov 2017 Oberseminar, Göttingen.
Arithmetic Statistics for quaternion algebras
Nov 2017 Number theory learning seminar, Göttingen.
Maass forms and spherical dual of SL2(R)
Nov 2017 Graduate seminar, Université Paris-Est.
Poincaré and its disk
Oct 2017 Number theory learning seminar, Göttingen.
First steps towards the coarse trace formula
Oct 2017 Junior Colloquium, Göttingen.
Modular forms and the sums of four square problem
Sept 2017 Number theory learning seminar, Göttingen.
Selection of the archimedean spectrum, following Duistermaat-Kolk-Varadarajan
July 2017 Journée Arithmétiques, Caen.
Type of symmetry of totally definite quaternion algebras
May 2017 Analytic Number TheoryWorkgroup, Institut Henri Poincaré, Paris.
Low-lying zeroes of L-functions
May 2017 Number TheoryWorkgroup, Université de Marseille, Luminy.
Trace formula through the modular surfaces
April 2017 Graduate Seminar, Université Paris 13.
The Linnik problem about sums of three squares
Nov 2016 Algebraic Geometry and Number Theory Seminar, EPFL, Lausanne.
Equidistribution of the universal family of quaternion algebras
October 2016 Analytic Number TheoryWorkgroup, IHP, Paris.
Symmetry type of algebraic groups
June 2016 Reading group on Iwaniec-Kowalski, IHP, Paris.
Modular and automorphic forms
June 2016 Doctoral School Day, Université Paris 13.
Groups, representations and the Langlands Program
May 2016 EJCTN, Université Blaise Pascal, Clermont-Ferrand.
Counting automorphic representations of totally definite quaternion algebras
April 2016 Junior seminar, Université Paris 13.
A swift tour of number theory, from elliptic curves to automorphic forms
March 2016 Reading group on the work of Iwaniec and Kowalski, IHP, Paris.
Two lectures about sums of characters
Feb. 2016 Analytic Number TheoryWorkgroup, Université Paris 11.
Two lectures on Sato-Tate conjectures for low-lying zeroes of zeta functions
January 2016 Junior seminar, Université d’Aix-Marseille.
Conductors and the automorphic representation counting problem
Dec. 2015 Trace FormulaWorkgroup, UPMC, Paris.
Athur-Selberg Trace Formula and geometric orbital integral estimations
Fall 2014 Analytic Number TheoryWorkgroup, Université Paris 11.
Three lectures around covolumes of fuchsians groups and Tamagawa numbers
April 2013 High school scientific lecture, Lycées Mounier and Lakanal.
Cryptography, through history and arithmetics
March 2012 High school scientific lecture, Lycées Mounier and Camille Sée.
Theory of graphs

  • Publications

[5] The volumes of Miyauchi’s subgroups (with I. Petrow).
in preparation, 2018
[4] Type of Symmetry of Quaternion Algebras.
to be submitted, 2018
[3] Arithmetical Statistics for Quaternion Algebras.
to be submitted, 2017
[2] L’algèbre, ou l’école de la raison.
Repères IREM, 2013
[1] Optimal Transportation with an Oscillation-Type Cost.
with Paul Pegon, Filippo Santambrogio. Set-Valued and Var. Anal. J., 2013

  • Teaching

2014 – 2017 Teaching assistant, Université Paris 13.
3rd year (L3) : Dierential Calculus and Optimization
2nd year (L2) : Analysis, Linear Algebra, Arithmetic
1st year (L1) : Analysis, Linear Algebra, Arithmetic, Mathematical Structures
2011 – 2014 Khôlles in Mathematics, Lycées Lakanal and Louis-le-Grand.
Weekly oral examination of CPGE’s students (first & second years of university)

  • Responsibilities

2017 – 2018 Organizer of the number theory learning seminar, Göttingen.
2016 – 2017 Organizer of the graduate seminar, Université Paris 13.
2015 – 2017 Graduate representative at the LAGA Council, Université Paris 13.
2015 – 2016 Organizer of a workgroup on Iwaniec and Kowalski’s book, IHP, Paris.
2014 – 2016 Graduate representative at the Doctoral School Council, Univ. Paris 13.
2013 – 2014 Students representative at the Scientific Council, ENS Cachan.

  • Philosophical works

Spring 2014 Epistemological and ontological reflexions on definitions.
Winter 2013 Historical study of Dedekind’s Vorlesungen über Zahlentheorie, §27.
Winter 2012 Philosophical reflexions on mathematical methods of proof.
Spring 2012 Study on the work of MaximilienWinter.
Spring 2012 How to think the periodisation of classical mathematics.
Sum. 2012 The conception of Infinite according to Louis Couturat.

  • Associative experience

2010 – 2018 GICS (Groupe pour l’Initiative et la Culture Scientifiques), www.gics.fr.
Founder and President (2010-2017), then administration board member (2017-)
Association aiming at promoting intellectual activity and science culture among
high schools students, giving lectures on topics which are not presented at their
level, and coordinating gradruates, engineers and doctors in order to do so
2011 – 2013 CAVE (Club des Amateurs de Vins de l’ENS), Founder and President.
Wine tasting association unveiling the wine world among students of ENS Cachan

  • Languages

French, Brazilian native languages
English, Spanish good working knowledge
Italian, German good comprehension, elementary speaking
Chinese learning
Further Interests
Hobbies Go, philosophy, oenology, orthograph, photography, hiking
Music Piano