Dr. Benjamin Collas

I now have moved to the RIMS Kyoto, Japan. Below is an excerpt of my mathematical activities in Bayreuth University; You will find more material on my arithmetic homotopy geometry activity in terms of publications, talks and workshop organization on my CNRS and RIMS webpages.

For future updates:Scientific Activity; International invitations; RIMS Activity.

Publications in Bayreuth

See here for Full Publications List.

Articles

• Monodromy of Elliptic Curve Convolution, Seven-point sheaves of G2-type, and Motives of Beauville type, 2018. With M. Dettweiler, S. Reiter and W. Sawin (v2, 26 pages, 12 figures) [ArXiv], [PDF].
• Hurwitz Stacks of Groups Extensions and Irreducibility, 2018 (v2-2020: major update, 26 pages,1 fig.) With S. Maugeais, [ArXiv].

Proceedings

• Arithmetic Geometry and Symmetries around Galois and Fundamental Groups, Mini-Workshop MFO 2018 - Introduction of the organizers with P. Dèbes and M. Fried (7 pages).
• Arithmetic and Homotopy of Moduli Stacks of Curves, in Oberwolfach Reports - OWR Report (8 pages).

Workshops and Seminars organization

See here for full list of Workshops Organization.

• Towards Chromatic Homotopy Theory. On Landweber Exact Functor Theorem, the stack of formal groups, Thom cobordism and complex-oriented cohomology theories, see programme and references (03.2019).
• Abelian Schemes over Spec Z. Following the proof of Fontaine, on Tate Theorem for elliptic curves, finite flat group schemes and ramification theory, see programme and references (06.2017).
• Arithmetic-Geometry Seminar, LII-IV Bayreuth, Germany, weekly joint seminar of Prof. Dettweiler and Prof. Stoll (2012-14).

Lectures in Bayreuth

During the Summer semester 2018: advanced lecture on ``Stacks and homotopy algebraic geometry'', see the moodle page of the lecture for programme and references. During Winter and Summer semester 2019: tutorials on Linear Algebra I & II.