Past Arithmetic Geometry Seminar

10 June 2016
11:00
K. Ardakov
Abstract

This talk will give a description of the period ring B_dR of Fontaine, which uses de Rham algebra computations. 

This talk is part of the workshop on Beilinson's approach to p-adic Hodge  theory.

  • Arithmetic Geometry Seminar
27 May 2016
11:00
Kevin McGerty
Abstract

This talk will describe the basic properties of the de Rham algebra, which is a generalisation of the de Rham algebra over smooth schemes, which was introduced by L. Illusie in his monograph 'Complexe cotangent et déformations'.

  • Arithmetic Geometry Seminar
20 May 2016
11:00
Damian Rössler
Abstract

This is the 4th talk of the study group on Beilinson's approach to p-adic Hodge theory, following the notes of Szamuley and Zabradi.

I shall finish the computation of the module of differentials of the ring of integers of the algebraic closure of Q_p and describe a universal thickening of C_p.

I shall also quickly introduce the derived de Rham algebra. Kevin McGerty will give a talk on the derived de Rham algebra in W5 or W6.

  • Arithmetic Geometry Seminar
6 May 2016
11:00
Damian Rössler
Abstract

This is the first talk of the workshop organised by F. Brown, M. Kim and D. Rössler on Beilinson's approach to p-adic Hodge theory. 

In this talk, we shall give the definition and recall various properties of the cotangent complex, which was originally defined by L. Illusie in his monograph "Complexe cotangent et déformations" (Springer LNM 239, 1971).

  • Arithmetic Geometry Seminar
11 March 2016
11:00
Damian Rössler
Abstract

Fang, Lu and Yoshikawa conjectured a few years ago that a certain string-theoretic invariant (originally introduced by the physicists M. Bershadsky, S. Cecotti, H. Ooguri, and C. Vafa) of Calabi-Yau threefolds is a birational invariant. This conjecture can be viewed as a "secondary" analog (in dimension three) of the birational invariance of Hodge numbers of Calabi-Yau varieties established by Batyrev and Kontsevich. Using the arithmetic Riemann-Roch theorem, we prove a weak form of this conjecture. 

  • Arithmetic Geometry Seminar

Pages