fables
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Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédenteProchaine révisionLes deux révisions suivantes | ||
fables [2022/06/14 09:06] – kalinin0 | fables [2023/02/12 13:07] – kalinin0 | ||
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====== Séminaire " | ====== Séminaire " | ||
- | The normal starting time of this seminar | + | ---- |
+ | |||
+ | 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 | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | | ||
+ | 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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Ligne 10: | Ligne 42: | ||
**Prof. | **Prof. | ||
+ | |||
**“Topology of spaces of Legendrian knots via Algebraic K-theory”** | **“Topology of spaces of Legendrian knots via Algebraic K-theory”** | ||
Abstract: The highly non-trivial stable homotopy groups of the Waldhausen’s | Abstract: The highly non-trivial stable homotopy groups of the Waldhausen’s | ||
h-cobordism space inject into the homotopy groups of spaces of appropriate Legendrian submanifolds. For instance, | h-cobordism space inject into the homotopy groups of spaces of appropriate Legendrian submanifolds. For instance, | ||
- | ---- | ||
- | Monday, Dec, 20th, 16h15 - 18h15 | ||
- | | ||
- | **On the asymptotics of Arakelov invariants** | ||
- | We will discuss the asymptotics of invariants of Riemann | ||
- | surfaces motivated by Arakelov theory. These invariants play a | ||
- | fundamental role in bounds for the number of geometric torsion points on | ||
- | curves. We will show that their asymptotic behaviour in families of | ||
- | degenerating Riemann surfaces is controlled by their tropical counterparts. | ||
---- | ---- | ||
Fri 17.12.2021, 13h30, room 6-13 | Fri 17.12.2021, 13h30, room 6-13 |
fables.txt · Dernière modification : 2023/12/05 11:54 de slavitya_gmail.com