Geometry and Analysis Seminar
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Mon, 13/10/2008 14:15 |
Tamas Hausel (Oxford) |
Geometry and Analysis Seminar  |
L3 |
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Mon, 27/10/2008 14:15 |
Esther Cabezas-Rivas (Warwick) |
Geometry and Analysis Seminar |
L3 |
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Mon, 03/11/2008 14:15 |
Nigel Hitchin (Oxford) |
Geometry and Analysis Seminar |
L3 |
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Mon, 10/11/2008 14:15 |
Thomas Schick (Goettingen) |
Geometry and Analysis Seminar K-Theory Day |
L3 |
| Let M be a closed spin manifold. Gromov and Lawson have shown that the presence of certain "enlargeable" submanifolds of codimension 2 is an obstruction to the existence of a Riemannian metric with positive scalar curvature on M. In joint work with Hanke, we refine the geoemtric condition of "enlargeability": it suffices that a K-theoretic index obstruction of the submanifold doesn't vanish. A "folk conjecture" asserts that all index type obstructions to positive scalar curvature should be read off from the corresponding index for the ambient manifold M (this this is equivalent to a small part of the strong Novikov conjecture). We address this question for the obstruction above and discuss partial results. | |||
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Mon, 17/11/2008 14:15 |
Gerard Laumon (CNRS and Universite Paris-Sud) |
Geometry and Analysis Seminar |
L3 |
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Mon, 24/11/2008 14:15 |
Balazs Szendroi (Oxford) |
Geometry and Analysis Seminar |
L3 |
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Mon, 01/12/2008 14:15 |
Christoph Sorger (Nantes) |
Geometry and Analysis Seminar |
L3 |
