Aurélien Sagnier
J.J.Sylvester Assistant Professor
John Hopkins University, Krieger School of Arts and Sciences, Department of Mathematics
Reasearch interests : Number theory, topos theory, arithmetic geometry, directed algebraic topology, characteristic one/tropical algebra and geometry
Johns Hopkins University
Krieger Hall 219
3400 N. Charles St.
Baltimore MD 21218
Phone : 4105165128
Email: asagnie1[\{a_t}\]jhu.edu
For teaching material click > here
Presentation
Documents
Then mathematics:

The text of my PhD thesisentitled «An arithmetic site of ConnesConsani type for imaginary quadratic fields with class number 1» defended the 11th July 2017 
The articlemade from my PhD Thesis with an appendix of Alain Connes and submitted to Journal of Number Theory 
And a recent prepublication: «Directed topological complexity » prepublished on ArXiv in collaboration with Eric Goubault and Michael Farber
Articles in preparation:

«Tropical tensor products» in collaboration with Stéphane Gaubert 
«A topostheoretic view on directed topology» in collaboration with Eric Goubault 
«An arithmetic site of ConnesConsani type for number fields with narrow class number 1» extending methods developped in PhD Thesis
Research statement available on request
Conferences and talks
 April 2017 Invited speaker to the Noncommutative Geometry 2017 Number Theory : A celebration of Alain Connes'70th birthday
Fudan Institute for Advanced Study, Shanghai  June 2017 Talk at
«Tropical days» on Connes and Consani's approach of the Riemann zeta function through arithmetic sites
Ecole Polytechnique, Palaiseau  January 2018 Talk at
Ohio State University on «An arithmetic site of ConnesConsani type for $\mathbb{Z}[\imath]$»
Ohio State University, Colombus, US  January 2018 Talk at
Rutgers University on «An arithmetic site of ConnesConsani type for $\mathbb{Z}[\imath]$»
Rutgers University, Piscataway, US  January 2018 Talk at
John Hopkins University on «An arithmetic site of ConnesConsani type for $\mathbb{Z}[\imath]$»
John Hopkins University, Baltimore, US  June 2018 Short communication at Toposes in Como on
«An arithmetic site of ConnesConsani type for $\mathbb{Z}[\sqrt{2}]$$»
Università degli Studi dell’Insubria, Como  August 2018 Short communication at the International Congress of Mathematicians, ICM 2018 on
«An arithmetic site of ConnesConsani type for $\mathbb{Z}[\imath]$»
ICM, Rio de Janeiro  September 2018 Short communication at the Tensors conference on
«Tropical tensors products$»
Polytecnico di Torino, Turin  November 2018 Talk at
University of Oslo on «An arithmetic site of ConnesConsani type for for number fields with narrow class number 1»
Oslo  November 2018 Talk at
University of Oslo on «ConnesConsani's way to zeta»
Oslo  March 2019 Talk at
University of Strasbourg on «An arithmetic site at the complex place»
Strasbourg  April 2019 Talk at
University of Antwerp on «An arithmetic site at the complex place»
Antwerp  October 2019 Short communication at the
international conference JAMI 2019 "RiemannRoch in characteristic one and related topics" on «An arithmetic site at the complex place»
John Hopkins University, Baltimore, US
Administrative duties
 January 2018now Organizer of a learning seminar on topos theory at Ecole Polytechnique (Palaiseau, France)
 NovemberDecember 2018 Preparation of a review of an article for Journal of Number Theory
 October 2019 Member of the organizing committee of the forthcoming conference "RiemannRoch in characteristic one and related topics" in John Hopkins University (Baltimore, US)
Teaching duties