Sommersemester 2009
Freitag, 10:30-11:30, Seminarraum 1
15.5.09 | Dr. William Kirwin (MPI Leipzig) Lagrangian fibrations of coadjoint orbits from the Iwasawa decomposition |
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22.5.09 | Prof. Krishnan Shankar (University of Oklahoma,
z.Zt. Münster) Riemannian submersions from compact Lie groups Abstract: We construct infinitely many examples of Riemannian submersions G → M, where G is a simple, compact Lie group, M is a smooth Riemannian manifold and such that M is not a quotient of G by any group U ⊆ Diff(G) acting freely on G. This is joint work with Martin Kerin. |
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29.5.09 | Prof. Viktor Schroeder (Universität Zürich) Ptolemy spaces Abstract: A metric space (X,d) is called a Ptolemy space if for any quadrupels of points x,y,z,w in X the three numbers d(x,y)d(z,w), d(x,z)d(y,w) and d(x,w)d(y,z) satisfy the triangle inequality. Ptolemy spaces arise naturally if one studies the ideal boundary of a noncompact simply connected manifold of negative curvature or more generally CAT(-1) spaces. We give an introduction to the geometry of these spaces with applications to manifolds of negative curvature. |
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12.6.09 | Dr. Chin-Yu Hsiao (Göteborg) On the singularities of the Bergman kernel Abstract: In this work, we obtain the full asymptotic expansion of the Bergman projection for (0,q)-forms when the Levi form is non-degenerate. This generalizes a result of Boutet de Monvel and Sjöstrand for (0,0)-forms. We will explain our method in an elementary fashion. We hope that this talk can serve as an introduction to certain microlocal techniques with applications in complex analysis. |
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19.6.09 10:30-12:00 |
Prof. András Stipsicz (Budapest) Heegaard Floer invariants in contact topology Abstract:This is the second lecture in a loosely connected series of three lectures. See this separate announcement. |
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26.6.09 10:30-12:00 |
Prof. András Stipsicz (Budapest) Surface singularities with rational homology disk smoothings |
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10.7.09 | Prof. Wolfgang Ziller (University of Pennsylvania) Positive Schnittkrümmung: Beispiele und Hindernisse in Faserbündeln |
H. Geiges, 5.4.02