Geometry seminar

Spring 2020

Date / Time Speaker Title Location
February 4, 2020
10:00-11:30
Liviu Ornea
IMAR si FMI
Coomologia algebrelor Lie nilpotente si clasificarea nilvarietatilor LCK Sala 307
Abstract:
January 21, 2020
10:00-11:30
Olivier Guichard
Universitatea Strasbourg
Teichmüller spaces and their generalizations Sala 307
Abstract: This talk will be devoted to present the Teichmüller space (ie the universal cover of the Riemann moduli space) and the different points of view (analytical, dynamical, homological, combinatorical) on it that have been developed the last thirty years. In turn, these different approaches give rise to new family of spaces called generalized Teichmüller spaces. If time permits, results of the speaker and his collaborators will be mentioned.

Fall 2019

Date / Time Speaker Title Location
December 10, 2019
10:00-11:30
Costin Vilcu
IMAR
Diametral points of convex bodies Sala 307
Abstract: Based on this preprint.
December 3, 2019
10:00-11:30
Gabriel Baditoiu
IMAR
Actiuni tranzitive si metrici Einstein omogene pe hiperboloizi Sala 307
Abstract:
November 26, 2019
10:00-11:30
Andrei Moroianu
CNRS Orsay
Metric connections with parallel skew-symmetric torsion Sala 307
Abstract: In this talk I will present some results, obtained in collaboration with Uwe Semmelmann and Richard Cleyton, about the structure of Riemannian manifolds carying a metric connection with parallel skew-symmetric (non-vanishing) torsion. These objects appear naturally in different geometric contexts, e.g. on naturally reductive homogeneous spaces, on Sasakian and 3-Sasakian manifolds, or on nearly Kähler and nearly parallel G_2 manifolds. Cleyton and Swann have classified them in the case of irreducible holonomy. In the reducible case, I will show that the manifold is the total space of a Riemannian submersion with totally geodesic homogeneous fibres over a Riemannian manifold which carries a metric connection with parallel skew-symmetric (possibly vanishing) torsion, and a principal bundle with parallel curvature. This result opens the way towards a possible classification of geometries with parallel skew-symmetric torsion.
November 19, 2019
10:00-11:30
Ovidiu Preda
IMAR
Coverings of LCK complex spaces Sala 307
Abstract:
November 12, 2019
10:00-11:30
Dan Burghelea
Ohio State University
From topology to geometry via analytic continuation Sala 307
Abstract:
November 5, 2019
10:00-11:30
Liana David
IMAR
The Dirac generating operator of a Courant algebroid Sala 307
Abstract:
October 29, 2019
10:00-11:30
Florin Belgun
IMAR
The Matthai-Quillen construction Sala 307
Abstract:
October 29, 2019
10:00-11:30
Sergiu Moroianu
IMAR
The generalized Gauss-Bonnet theorem Sala 307
Abstract:

Organizer: Sergiu Moroianu 

Archive:

Modified: 26.11.2019