[hep-th] seminari u petak

[Branislav Cvetkovic]

Postovane kolege,
u petak 30. aprila na Institutu za fiziku, u sali 300, bice odrzana dva
seminara po sledecem rasporedu:

10:00 Arthemy Kiselev, Mathematical Institute, Utrecht University

Title: Towards the variational quantization of strings, or "Give us the tools!"

Abstract:  I shall review the geometry and discuss the applicability of some
recently discovered structures for Integrable Systems. Namely, I
shall explain what objects are naturally related to the involutive
distributions of operator-valued evolutionary vector fields on the
infinite jet bundles over fibre bundles, and to their cohomological
properties. The variational Hamiltonian formalism for partial
differential equations, the symmetry algebras of the nonperiodic 2D Toda
chains associated with the root systems of semi-simple complex Lie
algebras, and a distinguished class of recursion operators for
integrable equations yield examples of such structures. The immediate
output of this research, on top of the most convenient integrability
criteria for systems of nonlinear Mathematical Physics, is the
introduction of flat affine connections with the bi-differential
Christoffel symbols, which could in future become a working geometric
model for the "variational" quantization of strings and in CFT.

11:30 Suresh Nampuri, Mathematical Physics and String theory Group, LMU Munich

Title: Issues and Aspects of Counting Dyonic Black Holes in N=4 String Theory

Abstract: In the last decade, significant progress has been made in the
understanding of the entropy of supersymetric dyonic black holes in N= string
theory. I will review some of this work and also talk about ideas in counting
entropy of non-supersymmetric black holes and its relation to the recent work
on counting the entropy of the Kerr black hole.


                                                      Pozdrav Branislav
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Institute of Physics Belgrade
http://www.ipb.ac.rs/