Archived Events

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Threshold functions for systems of equations on random sets [2]

Posted in

Talk [3]

Speaker:

Ana Zumalacárregui

Affiliation:

U. Autónoma de Madrid

Date:

Wed, 2013-05-08 14:15 - 15:15

Location:

MPIM Lecture Hall [4]

Parent event:

Number theory lunch seminar [5]

I will present a unified framework to deal with threshold
functions for the existence of certain combinatorial structures in random
sets. More precisely, let M·x=0 be a linear system defining our structure
(k-arithmetic progressions, k-sums, B_h[g] sets or Hilbert cubes, for
example), and A be a random set on {1,...,n} where each element is chosen
independently with the same probability.

I will show that, under certain natural conditions, there exists a
threshold function for the property "A^m contains a non-trivial solution of

Read more [2]

A few steps with Grothendieck derivators [6]

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Talk [3]

Speaker:

Moritz Groth

Affiliation:

Nijmegen

Date:

Wed, 2013-05-08 10:30 - 12:00

Location:

MPIM Lecture Hall [4]

Parent event:

Higher Differential Geometry Seminar [7]

The theory of derivators (going back to Grothendieck, Heller, and others) provides an axiomatic approach to homotopy theory. It adresses the problem that the rather crude passage from model categories to homotopy categories results in a serious loss of information. In the stable context, the typical defects of triangulated categories (non-functoriality of cone construction, lack of homotopy colimits) can be seen as a reminiscent of this fact.

Read more [6]

German Movie Premiere: The Genius of Srinivasa Ramanujan [8]

Posted in

Public [9]

Speaker:

Anantharam Raghuram

Affiliation:

MPIM

Date:

Tue, 2013-05-07 16:30 - 18:00

Location:

MPIM Lecture Hall [4]

This documentary is a celebration of the story of Ramanujan while walking in his footsteps trying to fathom his genius. I will begin with a very short (less than 5 minutes) introduction to the making of the documentary. Then we will watch the documentary; it is about one hour long. Finally, I can (try to) answer any questions the audience might have.

Read more [8]

An algebro-geometric approach to S-duality and T-duality and proof of modularity conjectures in BPS counting theories [10]

Posted in

Talk [3]

Speaker:

Artan Sheshmani

Affiliation:

MPI

Date:

Tue, 2013-05-07 14:00 - 15:00

Location:

MPIM Lecture Hall [4]

Parent event:

Seminar on Algebra, Geometry and Physics [11]

In String theory S-duality and T-duality each correspond to certain relation between two quantum field theories. The former corresponds to a duality between the two string theories with coupling constants which are inverse of each other and the latter describes a certain symmetry between two theories associated to different geometries.