Archived Events

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André-Quillen cohomology theory of an algebra over an operad [2]

Posted in

Talk [3]

Speaker:

Joan Millès

Date:

Thu, 2010-01-14 15:00 - 16:00

Location:

MPIM Lecture Hall [4]

Parent event:

MPI-Oberseminar [5]

Following the ideas of Quillen and by means of model category structures, Hinich, Goerss and Hopkins have developped a cohomology theory for (simplicial) algebras over a (simplicial) operad. Thank to Koszul duality theory of operads, we describe the cotangent complex to make these theories explicit in the differential graded setting. We recover the known theories as Hochschild cohomology theory for associative algebras and Chevalley-Eilenberg cohomology theory for Lie algebras and we define the new case of homotopy algebras.

Read more [2]

Automorphic forms on $GL(2)$ [6]

Posted in

Talk [3]

Speaker:

C. Kaiser

Affiliation:

MPIM

Date:

Thu, 2010-01-14 13:00 - 14:00

Location:

MPIM Lecture Hall [4]

Mapping class group and moduli space [7]

Posted in

Talk [3]

Speaker:

G. Scaria

Affiliation:

MPIM

Date:

Wed, 2010-01-13 16:30 - 17:30

Location:

MPIM Lecture Hall [4]

Monodromy invariants of the fibrations over projective line [8]

Posted in

Talk [3]

Speaker:

Viktor S. Kulikov

Affiliation:

Steklov Inst. Moscow/MPI

Date:

Tue, 2010-01-12 14:00 - 15:00

Location:

MPIM Lecture Hall [4]

One of the main problems of geometry is to find discrete invariants distinguishing geometric objects up to some equivalence. In algebraic geometry, the classical approach, based on ideas of Riemann, Hurwitz, Lefschetz, consists of representations of complex algebraic manifolds either as finite coverings of the projective spaces (generic coverings) or as codimension one fibrations over the projective line (Lefschetz pencils).

Read more [8]

Geometric superrigidity and harmonic maps [9]

Posted in

Talk [3]

Speaker:

Chikako Mese

Affiliation:

Johns Hopkins U.

Date:

Mon, 2010-01-11 15:00 - 16:00

Location:

MPIM Lecture Hall [4]

We discuss rank one and higher rank superrigidity for the isometry groups of a class of complexes which includes hyperbolic buildings as a special case. Our method uses harmonic maps to singular spaces.

Rankin-Selberg method [10]

Posted in

Talk [3]

Speaker:

S. Bhattacharya

Affiliation:

MPIM

Date:

Fri, 2010-01-08 11:00

Location:

MPIM Lecture Hall [4]

Index and fundamental group of a lamination [11]

Posted in

Talk [3]

Speaker:

Martin Lustig

Date:

Thu, 2010-01-07 16:30 - 17:30

Location:

MPIM Lecture Hall [4]

$q$-deformed Whittaker functions and Demazure modules [12]

Posted in

Talk [3]

Speaker:

Sergey Oblezin

Affiliation:

ITEP Moscow / MPIM

Date:

Thu, 2010-01-07 15:00 - 16:00

Location:

MPIM Lecture Hall [4]

Parent event:

MPI-Oberseminar [5]

Whittaker functions are special functions on reductive groups, which are naturally arising in the theory of automorphic representations. The talk is devoted to recent results (joint with A. Gerasimov and D. Lebedev) on explicit construction of $q$-deformation of Whittaker functions for the group $GL(N,\mathbb{R})$. In the first part of my talk I will introduce two (integral) representations of $GL(N)$-Whittaker function, using two different limits of Macdonald polynomials. The first representation is a $q$-deformation of the classical Gelfand-Zetlin formula for the character.

Read more [12]

Combinatorial cubic surfaces and Mordell-Weil [13]

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Talk [3]

Speaker:

Yuri Manin

Affiliation:

MPIM

Date:

Tue, 2010-01-05 14:00 - 15:00

Location:

MPIM Lecture Hall [4]

The geometric version of weak Mordell-Weil problem for cubic surfaces over number fields,- finite generation of the set of rational points,- still remains unsolved problem. At the HIM workshop "Diophantine Equations", Spring 2009, I formulated the program of a new approach to this problem, with model theoretic flavor.

Read more [13]

IMPRS-seminar on K-theory [14]

Posted in

Seminar [15]

Organiser(s):

C. Kaiser

Date:

Fri, 2010-01-01 09:27 - Fri, 2010-12-31 09:27

Details:

Program [16] and Abstracts [17] of IMPRS-seminar on K-theory