Wochenplan des Fachbereichs Mathematik und Informatik

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shupp_01

Oberseminar Differentialgeometrie: Fernando Galaz-Garcia (KIT): On quotients of spaces with Ricci curvature bounded below

Monday, 14.10.2019 16:15 im Raum SR4
Mathematik und Informatik

Abstract: Let M be a Riemannian manifold and let G be a compact Lie group acting on M effectively and by isometries. It is well known that a lower bound of the sectional curvature of M is again a bound for the curvature of the quotient space of the action, which is an Alexandrov space of curvature bounded below. Moreover, the analogous stability property holds for metric foliations and submersions. Although this does not hold for Ricci curvature, a corresponding stability property does hold for synthetic Ricci curvature lower bounds. Specifically, for quotients of RCD*(K,N)-spaces under isomorphic compact group actions and, more generally, under metric-measure foliations and submetries. In this talk I will discuss the proof of this result as well as some geometric applications. This is joint work with Martin Kell, Andrea Mondino and Gerardo Sosa.



Angelegt am Tuesday, 27.08.2019 09:00 von shupp_01
Geändert am Wednesday, 11.09.2019 09:54 von shupp_01
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Oberseminare und sonstige Vorträge
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harenbrh

Mittagsseminar: Ben Heuer (Bonn): Perfectoid geometry of p-adic modular forms

Tuesday, 15.10.2019 10:00 im Raum SR 1C
Mathematik und Informatik



Angelegt am Monday, 07.10.2019 15:07 von harenbrh
Geändert am Monday, 07.10.2019 15:07 von harenbrh
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Oberseminare und sonstige Vorträge
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elke

Johannes Ebert: Index theory in spaces of manifolds. Oberseminar C*-Algebren.

Tuesday, 15.10.2019 15:15 im Raum SRZ 216
Mathematik und Informatik



Angelegt am Monday, 07.10.2019 09:37 von elke
Geändert am Tuesday, 08.10.2019 14:37 von elke
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Oberseminare und sonstige Vorträge
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folkeri

Oberseminar p-adische Arithmetik: Urs Hartl: Algebraic Stacks II

Tuesday, 15.10.2019 16:15 im Raum SR 1C
Mathematik und Informatik



Angelegt am Thursday, 10.10.2019 12:57 von folkeri
Geändert am Thursday, 10.10.2019 12:57 von folkeri
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Oberseminare und sonstige Vorträge
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pfeifer

Amador Martin-Pizarro (Albert-Ludwigs-Universität Freiburg): Equational and non-equational theories

Thursday, 17.10.2019 11:00 im Raum SR 1D
Mathematik und Informatik

A first-order theory is equational if every definable set is a Boolean combination of instances of equations, that is, of formulae such that the family of finite intersections of instances has the descending chain condition. Equationality is a strengthening of stability yet so far only two examples of non-equational stable theories are known. We construct non-equational stable theories by a suitable colouring of the free pseudospace, based on Hrushovski and Srour's original example.



Angelegt am Monday, 14.10.2019 11:12 von pfeifer
Geändert am Monday, 14.10.2019 11:12 von pfeifer
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folkeri

Oberseminar p-adische Arithmetik: Urs Hartl: Algebraic Stacks I

Tuesday, 08.10.2019 16:15 im Raum SR 1C
Mathematik und Informatik



Angelegt am Thursday, 10.10.2019 12:57 von folkeri
Geändert am Thursday, 10.10.2019 12:57 von folkeri
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Oberseminare und sonstige Vorträge
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boeckena

Christopher Deninger (WWU Münster): t.b.a. (Oberseminar Topologie)

Monday, 21.10.2019 14:00 im Raum SRZ 216
Mathematik und Informatik



Angelegt am Wednesday, 09.10.2019 13:43 von boeckena
Geändert am Wednesday, 09.10.2019 13:43 von boeckena
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