fables
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fables [2022/06/20 15:52] – g.m | fables [2023/02/12 13:07] – kalinin0 | ||
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====== Séminaire " | ====== Séminaire " | ||
+ | |||
+ | ---- | ||
+ | |||
+ | Monday, February 27, 2023 | ||
+ | room 6-13 | ||
+ | |||
+ | **15h00 Evgeni Abakoumov (Paris/ | ||
+ | |||
+ | **Chui' | ||
+ | |||
+ | Abstract: | ||
+ | |||
+ | ** 16h00 Ferit Ozturk (Istanbul/ | ||
+ | |||
+ | **Every real 3-manifold admits a real contact structure** | ||
+ | |||
+ | Abstract: We survey our results regarding real contact 3-manifolds and present our result in the title. | ||
+ | A real 3-manifold is a smooth 3-manifold together with an orientation preserving smooth involution, called a real structure. | ||
+ | A real contact 3-manifold is a real 3-manifold with a contact distribution that is antisymmetric with respect to the real structure. | ||
+ | The standard examples of real contact 3-manifolds are link manifolds of isolated, real analytic surface singularities. | ||
+ | We show that every real contact 3-manifold can be obtained via contact surgery along invariant knots starting from the standard real contact 3-sphere. | ||
+ | As a corollary we show that any oriented overtwisted contact structure on an integer homology real 3-sphere can be isotoped to be real. | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | Monday, February 6, 2023 | ||
+ | 16:00, room 6-13 | ||
+ | |||
+ | **Sergey Finashin (Ankara)** | ||
+ | |||
+ | **“Affine Real Cubic Surfaces”** | ||
+ | |||
+ | Abstract: (A joint work with V.Kharlamov) We prove that the space of | ||
+ | affine, transversal at infinity, non-singular real cubic surfaces has 15 connected components. We give a topological criterion to distinguish them and show also how these 15 components are adjacent to each other via wall-crossing. | ||
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fables.txt · Dernière modification : 2023/12/05 11:54 de slavitya_gmail.com