Geometry seminar

Fall 2019

Date / Time Speaker Title Location
December 3, 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