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: