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Seminar
FIELD Mathematics
DATE February 17 (Mon), 2020
TIME 17:10-18:10
PLACE 1423
SPEAKER Matsumoto, Yoshihiko
HOST Bhamidi, S.S Sreedhar
INSTITUTE Osaka University
TITLE [GS_M_3W] Three W's Seminar: On Cartan connections
ABSTRACT Riemannian manifolds are infinitesimally Euclidean. Likewise, one may think about geometries in which spaces are infinitesimally modeled on homogeneous spaces?Cartan connections are what describe them. In this talk, I’m going to discuss the naturalness of the idea of Cartan connections, putting some emphasis on the notion of development of curves, and explain what the Cartan connections describing Riemannian and conformal geometry are like. It is worth noting that the Weyl curvature tensor, whose vanishing characterizes the local conformal flatness, is best understood along this line of thought. I’m also planning to touch upon the relation of the conformal Cartan connection to the Fefferman-Graham “ambient metric” construction and to Poincar?-Einstein manifolds.
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