fables
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Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédenteProchaine révisionLes deux révisions suivantes | ||
fables [2022/06/14 09:04] – kalinin0 | fables [2023/03/23 22:51] – kalinin0 | ||
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====== Séminaire " | ====== Séminaire " | ||
+ | ---- | ||
+ | Monday, April 3, 2023 | ||
+ | room 6-13 | ||
+ | |||
+ | **15h00 — Alexander Bobenko (TU Berlin)** | ||
- | The normal starting time of this seminar | + | **Discrete conformal mappings, ideal hyperbolic polyhedra, and Ronkin function** |
+ | |||
+ | The general idea of discrete differential geometry | ||
---- | ---- | ||
+ | Monday, March 27, 2023 | ||
+ | room 6-13 | ||
+ | | ||
+ | **16h00 — Sebastian Haney (Columbia U)** | ||
- | Thursday, June 16, 2022 | + | **Mirror Lagrangians to lines in P^3** |
- | 16:00, room 1-07 | + | |
- | Prof. Yakov Eliashberg | + | We discuss work in progress in which we construct, for any tropical curve in $R^n$ with vertices of valence at most $4$, a Lagrangian submanifold of $(C^*)^n$ whose moment map projection is a tropical amoeba. These Lagrangians will have singular points modeled on the Harvey-Lawson cone over a $2$-torus. We also consider a certain $4$-valent tropical curve in $R^3$, for which we can modify the singular Lagrangian lift to obtain a cleanly immersed Lagrangian. The objects of the wrapped Fukaya category supported on this Lagrangian correspond, under mirror symmetry, to lines in $CP^3$. If time permits, we will explain how to use functors induced by Lagrangian correspondences to see this mirror relation. |
- | | + | ---- |
+ | | ||
+ | room 6-13 | ||
- | Abstract: The highly non-trivial stable homotopy groups of the Waldhausen’s | + | **16h00 — Ilia Itenberg (Sorbonne)** |
- | h-cobordism space inject into the homotopy groups of spaces of appropriate Legendrian submanifolds. For instance, | + | |
- | Jeudi 16 juin 2022 à 16h00, salle 1-07 | + | |
+ | **Maximal real algebraic hypersurfaces of projective spaces** | ||
+ | |||
+ | The talk is devoted to a combinatorial patchworking construction of maximal (in the sense of the generalized Harnack inequality) real algebraic hypersurfaces in real projective spaces (joint work with Oleg Viro). | ||
+ | During the talk, we will mainly concentrate on the construction of a maximal quintic hypersurface in the 4-dimensional real projective space. | ||
---- | ---- | ||
- | Monday, Dec, 20th, 16h15 - 18h15 | ||
- | | ||
- | **On the asymptotics of Arakelov invariants** | ||
- | We will discuss the asymptotics of invariants | + | Monday, March 6, 2023 |
- | surfaces motivated | + | room 6-13 |
- | fundamental role in bounds for the number | + | |
- | curves. We will show that their asymptotic behaviour in families | + | **15h00 — Ali Ulaş Özgür Kişisel (METU, Ankara)** |
- | degenerating Riemann | + | |
+ | **Expected measures of amoebas of random plane curves** | ||
+ | |||
+ | There are several natural measures that one can place on the amoeba of an algebraic curve in the complex projective plane. Passare and Rullgård prove that the total mass of the Lebesgue measure on the amoeba of a degree $d$ curve is bounded above by $π^{2} d^{2} / 2$, by comparing it to another Monge-Ampère type measure, which is dual to the usual measure on the Newton polytope of the defining polynomial via the Legendre transform. Mikhalkin generalizes this upper bound to half-dimensional complete intersections in higher dimensions, by considering another measure supported on their amoebas; their multivolume. The goal of this talk will be to discuss | ||
+ | |||
+ | ---- | ||
+ | |||
+ | Monday, February 27, 2023 | ||
+ | room 6-13 | ||
+ | |||
+ | **15h00 — Evgeni Abakoumov (Paris/ | ||
+ | |||
+ | **Chui' | ||
+ | |||
+ | C. K. Chui conjectured in 1971 that the average gravitaional field strength in the unit disk due to unit point masses on its boundary was the smallest when these point masses were equidistributed on the circle. We will present an elementary solution to some weighted versions of this problem, and discuss related questions concerning approximation of holomorphic functions | ||
+ | |||
+ | **16h00 — Ferit Ozturk (Istanbul/ | ||
+ | |||
+ | **Every real 3-manifold admits | ||
+ | |||
+ | We survey our results regarding real contact 3-manifolds and present our result | ||
+ | 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 | ||
+ | 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 | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | Monday, February 6, 2023 | ||
+ | 16:00, room 6-13 | ||
+ | |||
+ | **Sergey Finashin (Ankara)** | ||
+ | |||
+ | **“Affine Real Cubic Surfaces”** | ||
+ | |||
+ | Abstract: (A joint work with V.Kharlamov) | ||
+ | affine, transversal at infinity, non-singular real cubic surfaces | ||
+ | |||
+ | ---- | ||
+ | |||
+ | Thursday, June 16, 2022 | ||
+ | 16:00, room 1-07 | ||
+ | |||
+ | **Prof. | ||
+ | |||
+ | **“Topology of spaces of Legendrian knots via Algebraic K-theory”** | ||
+ | |||
+ | 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, | ||
---- | ---- | ||
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