48 résultats : topology

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48 résultats
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résultats 1 à 10
Canal-U
Description : Percolation of random nodal lines
Mots clés : Grenoble, percolation, UGA, topology, metric geometry, geometric analysis, summer school, institut fourier, CNRS, nodal lines
Date : 01-07-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : I will discuss whether the Minkowski sum of two compact convex bodies can be made smoother by a generic rotation of one of them.  Here "generic" is understood in the sense of Baire category. The main result is a construction of an infinitely differentiable convex plane domain whose Minkowski sum ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, metric geometry, topology, UGA, Minkowski sum
Date : 29-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : We study sequences of closed minimal hypersurfaces (in closed Riemannian manifolds) that have uniformly bounded index and area. In particular, we develop a bubbling result which yields a bound on the total curvature along the sequence. As a consequence, we obtain qualitative control on the topology ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, topology, UGA, minimal hypersurfaces, bounded aera
Date : 27-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : The Margulis lemma describes the structure of the group generated by small loops in the fundamental group of a Riemannian manifold, thus giving a picture of its local topology. Originally stated for homogeneous spaces by C. Jordan, L. Bieberbach, H. J. Zassenhaus, D. Kazhdan-G. Margulis, it has ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, metric geometry, topology, UGA, Margulis lemma
Date : 20-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : The Margulis lemma describes the structure of the group generated by small loops in the fundamental group of a Riemannian manifold, thus giving a picture of its local topology. Originally stated for homogeneous spaces by C. Jordan, L. Bieberbach, H. J. Zassenhaus, D. Kazhdan-G. Margulis, it has ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, metric geometry, topology, UGA, Margulis lemma
Date : 21-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : The Margulis lemma describes the structure of the group generated by small loops in the fundamental group of a Riemannian manifold, thus giving a picture of its local topology. Originally stated for homogeneous spaces by C. Jordan, L. Bieberbach, H. J. Zassenhaus, D. Kazhdan-G. Margulis, it has ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, metric geometry, topology, UGA, Margulis lemma
Date : 21-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : The Margulis lemma describes the structure of the group generated by small loops in the fundamental group of a Riemannian manifold, thus giving a picture of its local topology. Originally stated for homogeneous spaces by C. Jordan, L. Bieberbach, H. J. Zassenhaus, D. Kazhdan-G. Margulis, it has ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, metric geometry, topology, UGA, Margulis lemma
Date : 22-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : The Margulis lemma describes the structure of the group generated by small loops in the fundamental group of a Riemannian manifold, thus giving a picture of its local topology. Originally stated for homogeneous spaces by C. Jordan, L. Bieberbach, H. J. Zassenhaus, D. Kazhdan-G. Margulis, it has ...
Mots clés : Grenoble, CNRS, institut fourier, summer school, geometric analysis, metric geometry, topology, UGA, Margulis lemma
Date : 23-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : With Robert Haraway, Robert Meyerhoff, Nathaniel Thurston and Andrew Yarmola. We address the following question. What are all the 1-cusped hyperbolic 3-manifolds whose maximal cusps have low volume?  Among other things we will outline a proof that the figure-8 knot complement and its sister are ...
Mots clés : Grenoble, UGA, topology, metric geometry, geometric analysis, summer school, institut fourier, volume, CNRS, cups
Date : 28-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0
Canal-U
Description : The Riemann Mapping Theorem asserts that any simply connected planar domain which is not the whole of it, can be mapped by a conformal homeomorphism onto the open unit disk. After normalization, this map is unique and is called the Riemann mapping. In the 90's, Ken Stephenson, motivated by a circle ...
Mots clés : Grenoble, electrical networks, UGA, topology, metric geometry, geometric analysis, summer school, institut fourier, CNRS, Stephenson's conjecture
Date : 27-06-2016
Droits : Droits réservés à l'éditeur et aux auteurs. CC BY-NC-ND 4.0