Dear all,

I would like to announce the following two Mathematics and String theory seminars at Kavli IPMU.

1) 
Speaker: Yakov Kononov	(HSE, Moscow)
Date: Tue, Oct 13, 2015, 10:00 - 11:30
Place: Seminar Room A, Kavli IPMU

Title: K. Saito structures and string theory

Abstract: Some models of topological quantum field theory and string theory can be solved using its relation with K.Saito theory. The crucial point for obtaining explicit expression for correlation functions is to find flat coordinates in terms of deformation parameters of the singularity. In the talk I will give an overview of these results and propose a direct way for computation using the approaches of Saito and Noumi.


2)
Speaker: Pierre Schapira	(U of Paris VI)
Date: Tue, Oct 13, 2015, 13:15 - 14:45
Place: Seminar Room B, Kavli IPMU

Title: Sheaves on Lorentzian manifolds

Abstract: We introduce a class of causal manifolds which contains the globally hyperbolic spacetimes and we prove global propagation theorems for sheaves on such manifolds. As an application, we solve globally the Cauchy problem for hyperfunction solutions of hyperbolic systems. 

Besides the classical Cauchy-Kowalevsky theorem, our proofs only use tools and ideas from the microlocal theory of sheaves of [M. Kashiwara and P. Schapira, Sheaves on Manifolds, Grundlehren der Math. Wiss. 292 Springer-Verlag (1990)], that is, tools of purely algebraic and geometric nature.

-----------------------------

Todor Eliseev Milanov
Associate Professor 
Kavli IPMU,  Japan

todor.milanov at ipmu.jp