Archived Events

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Siegel Eisenstein series and Humbert varieties [2]

Posted in

Talk [3]

Speaker:

M. Viazovska

Date:

Fri, 2010-01-29 11:00 - 12:00

Location:

MPIM Lecture Hall [4]

Entropy-rigidity of convex cocompact manifolds [5]

Posted in

Talk [3]

Speaker:

Samuel Tapie

Date:

Thu, 2010-01-28 16:30 - 17:30

Location:

MPIM Lecture Hall [4]

Parent event:

Oberseminar Differentialgeometrie [6]

Six vertex model and enumerations of alternating-sign matrices [7]

Posted in

Talk [3]

Speaker:

A. V. Razumov

Affiliation:

Inst. for High Engergy Physics, Protvino/MPI

Date:

Thu, 2010-01-28 15:00 - 16:00

Location:

MPIM Lecture Hall [4]

Parent event:

MPI-Oberseminar [8]

One more interaction between theoretical physics and mathematics will be discussed. There is a famous combinatorial problem to enumerate the so-called alternating-sign matrices, which are a generalization of the permutation matrices. This problem was solved by Doron Zeilberger in 1995. Much simpler solution was given by Greg Kuperberg in 1996. It was based on the one-to-one correspondence between the alternating-sign matrices and the states of the statistical six-vertex model.

Read more [7]

Automorphic forms on $GL(2)$ III [9]

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Talk [3]

Speaker:

C. Kaiser

Affiliation:

MPIM

Date:

Thu, 2010-01-28 12:00 - 13:00

Location:

MPIM Lecture Hall [4]

Duality in the triangulated category of singularities [10]

Posted in

Talk [3]

Speaker:

Daniel Murfet

Affiliation:

Bonn

Date:

Thu, 2010-01-28 10:30 - 11:30

Location:

MPIM Lecture Hall [4]

The Nielsen-Thurston classification [11]

Posted in

Talk [3]

Speaker:

C. Weiss

Affiliation:

U. Bonn /MPIM

Date:

Wed, 2010-01-27 17:15 - 18:15

Location:

MPIM Lecture Hall [4]

Mapping class group and moduli space III [12]

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Talk [3]

Speaker:

G. Scaria

Affiliation:

MPIM

Date:

Wed, 2010-01-27 16:30 - 17:30

Location:

MPIM Lecture Hall [4]

Periods of mixed Tate motives. Examples, l-adic Galois side. [13]

Posted in

Talk [3]

Speaker:

Zdzislaw Wojtkowiak

Affiliation:

U de Nice-Sophie-Antipolis/MPI

Date:

Tue, 2010-01-26 16:30 - 17:30

Location:

MPIM Lecture Hall [4]

The iterated integrals from 01 to 10 in sequences of one-forms $dz/z$ and $dz/(z-1)$ are periods of mixed Tate motives over Spec Z. The obvious question is if in this way we shall get all periods of mixed Tate motives over Spec Z. We shall construct an l-adic Galois version of this problem and its generalization. We shall construct in the l-adic Galois setting all periods of mixed Tate motives (we call them coefficients) over Spec Z $[1/p]$, hence also over Spec Z, and also over Spec Z[i $\sqrt{p}$] (with $p=3(mod 4)$ in the last case).

Read more [13]

F-manifolds and quantum cohomology [14]

Posted in

Talk [3]

Speaker:

Yu. Manin

Affiliation:

MPIM

Date:

Tue, 2010-01-26 14:00 - 15:00

Location:

MPIM Lecture Hall [4]

I will define and explain basic facts about F-manifolds. This differential geometric structure is a weakining of the notion of Frobenius manifold encoding Quantum Cohomology in genus zero.

Topology of non-isolated Singularities [15]

Posted in

Talk [3]

Speaker:

Mamuka Shubladze

Affiliation:

Tbilisi / MPI

Date:

Mon, 2010-01-25 15:00 - 16:00

Location:

MPIM Lecture Hall [4]

We study the topological structure of non-isolated singularities of analytic functions of several complex variables. we proved that for some classes of non-isolated singularities Milnor fibre is homotopy equivalent to a bouquet of spheres. we give an explicit expression of the numbers of spheres in the bouquet.