researchseminars.org

Balázs Szendrői (University of Oxford)
2020-05-01 12:30 - 13:30 UTC | https://researchseminars.org/talk/GandT/1/
Title: Hilbert schemes of points on singular surfaces: combinatorics, geometry, and representation theory (https://researchseminars.org/talk/GandT/1/)
by Balázs Szendrői (University of Oxford) as part of The London geometry and topology seminar

Abstract: TBA

Tye Lidman (NC State University)
2020-05-08 12:30 - 13:30 | https://researchseminars.org/talk/GandT/2/
Title: Conway spheres and Dehn surgery. (https://researchseminars.org/talk/GandT/2/)
by Tye Lidman (NC State University) as part of The London geometry and topology seminar

Abstract: TBA

Laura Pertusi (Università degli Studi di Milano)
2020-05-15 12:30 - 13:30 | https://researchseminars.org/talk/GandT/3/
Title: Stability conditions and moduli spaces for Kuznetsov components of Gushel-Mukai varieties (https://researchseminars.org/talk/GandT/3/)
by Laura Pertusi (Università degli Studi di Milano) as part of The London geometry and topology seminar

Abstract: TBA

Emma Brakkee (University of Amsterdam)
2020-05-22 12:30 - 13:30 | https://researchseminars.org/talk/GandT/4/
Title: Moduli of twisted K3 surfaces (https://researchseminars.org/talk/GandT/4/)
by Emma Brakkee (University of Amsterdam) as part of The London geometry and topology seminar

Abstract
Motivated by the relation between (twisted) K3 surfaces and special cubic fourfolds, we construct moduli spaces of polarized twisted K3 surfaces of fixed degree and order. We do this by mimicking the construction of the moduli space of untwisted polarized K3 surfaces as a quotient of a bounded symmetric domain.

Antonio De Rosa (New York University)
2020-05-29 12:30 - 13:30 | https://researchseminars.org/talk/GandT/5/
Title: Uniqueness of critical points of the anisotropic isoperimetric problem (https://researchseminars.org/talk/GandT/5/)
by Antonio De Rosa (New York University) as part of The London geometry and topology seminar

Abstract
The anisotropic isoperimetric problem consists in enclosing a prescribed volume in a closed hypersurface with least anisotropic energy. Although its solutions, referred to as Wulff shapes, are well understood, the characterization of the associated critical points is more subtle. In this talk we present a uniqueness result: Given an elliptic integrand of class $C^3$, we prove that finite unions of disjoint (but possibly mutually tangent) open Wulff shapes with equal radii are the only volume-constrained critical points of the anisotropic surface energy among all sets with finite perimeter and reduced boundary almost equal to its closure. To conclude, we will discuss a quantitative stability for this rigidity theorem.
Joint work with Mario Santilli and Slawomir Kolasinski.

Vladimir Lazić (Universität des Saarlandes)
2020-06-12 12:30 - 13:30 | https://researchseminars.org/talk/GandT/6/
Title: Which properties of the canonical class depend only on its first Chern class? (https://researchseminars.org/talk/GandT/6/)
by Vladimir Lazić (Universität des Saarlandes) as part of The London geometry and topology seminar

Abstract
Abstract: Given a projective variety X with mild singularities and a line bundle L on it, it is a natural question to determine which properties of L are encoded by its first Chern class. I will argue that most of the interesting properties of the canonical bundle of X, such as its effectivity or semiampleness, are indeed almost always encoded by its first Chern class. The results are a consequence of the Minimal Model Program and Hodge theory, and are new even on surfaces. This is joint work with Thomas Peternell.

Kathlén Kohn (KTH, Stockholm)
2020-06-19 12:30 - 13:30 | https://researchseminars.org/talk/GandT/7/
Title: Projective geometry of Wachspress coordinates. (https://researchseminars.org/talk/GandT/7/)
by Kathlén Kohn (KTH, Stockholm) as part of The London geometry and topology seminar

Abstract
This talk brings many areas together: discrete geometry, statistics, intersection theory, classical algebraic geometry, and geometric modeling.
First, we recall the definition of the adjoint of a polytope given by Warren in 1996 in the context of geometric modeling. He defined this polynomial to generalize barycentric coordinates from simplices to arbitrary polytopes. Secondly, we show how this polynomial appears in statistics. It is the numerator of a generating function over all moments of the uniform probability distribution on a polytope. Thirdly, we characterize the adjoint via a vanishing property: it is the unique polynomial of minimal degree which vanishes on the non-faces of a polytope. In addition, we see that the adjoint appears as the central piece in Segre classes of monomial schemes. Finally, we observe that adjoints of polytopes are special cases of the classical notion of adjoints of divisors. Since the adjoint of a simple polytope is unique, the corresponding divisors have unique canonical curves. In the case of three-dimensional polytopes, we show that these divisors are either K3- or elliptic surfaces.
This talk is based on joint works with Kristian Ranestad, Boris Shapiro and Bernd Sturmfels

Andrew Lobb
2020-10-23 13:30 - 14:30 | https://researchseminars.org/talk/GandT/8/
Title: The rectangular peg problem (https://researchseminars.org/talk/GandT/8/)
by Andrew Lobb as part of The London geometry and topology seminar

Abstract: TBA

Carlos Améndola
2020-10-30 13:30 - 14:30 | https://researchseminars.org/talk/GandT/9/
Title: Maximum Likelihood Estimation of Toric Fano Varieties. (https://researchseminars.org/talk/GandT/9/)
by Carlos Améndola as part of The London geometry and topology seminar

Abstract: TBA

Florian Naef
2020-11-06 13:30 - 14:30 | https://researchseminars.org/talk/GandT/10/
Title: The string coproduct (https://researchseminars.org/talk/GandT/10/)
by Florian Naef as part of The London geometry and topology seminar

Abstract: TBA

Steve Oudot
2020-11-13 13:30 - 14:30 | https://researchseminars.org/talk/GandT/11/
Title: Local characterizations of poset representations: the case of the plan (https://researchseminars.org/talk/GandT/11/)
by Steve Oudot as part of The London geometry and topology seminar

Abstract: TBA

Anthea Monod
2020-11-20 13:30 - 14:30 | https://researchseminars.org/talk/GandT/12/
Title: Tropical Geometry of Phylogenetic Tree Spaces. (https://researchseminars.org/talk/GandT/12/)
by Anthea Monod as part of The London geometry and topology seminar

Abstract: TBA

Boris L Tsygan
2020-11-27 13:30 - 14:30 | https://researchseminars.org/talk/GandT/13/
Title: Notes on noncommutative forms and Hochschild chains (https://researchseminars.org/talk/GandT/13/)
by Boris L Tsygan as part of The London geometry and topology seminar

Abstract: TBA

David Fernandez
2020-12-04 13:30 - 14:30 | https://researchseminars.org/talk/GandT/14/
Title: Noncommutative Poisson geometry and pre-Calabi-Yau algebras (https://researchseminars.org/talk/GandT/14/)
by David Fernandez as part of The London geometry and topology seminar

Abstract: TBA

Spencer Bloch
2020-12-11 13:30 - 14:30 | https://researchseminars.org/talk/GandT/15/
Title: The world’s simplest degeneration of algebraic varieties (https://researchseminars.org/talk/GandT/15/)
by Spencer Bloch as part of The London geometry and topology seminar

Abstract: TBA

Jeremy Lane
2020-12-18 13:30 - 14:30 | https://researchseminars.org/talk/GandT/16/
Title: Stratified gradient-Hamiltonian vector fields and applications in symplectic geometry. (https://researchseminars.org/talk/GandT/16/)
by Jeremy Lane as part of The London geometry and topology seminar

Abstract: TBA

Catharina Stroppel (University of Bonn)
2021-01-22 13:30 - 14:30 | https://researchseminars.org/talk/GandT/17/
Title: Verlinde rings and DAHA actions (https://researchseminars.org/talk/GandT/17/)
by Catharina Stroppel (University of Bonn) as part of The London geometry and topology seminar

Abstract: TBA

Angela Wu (Imperial College)
2021-01-29 13:30 - 14:30 | https://researchseminars.org/talk/GandT/18/
Title: How to draw the Weinstein handlebody diagram of the complement of a smoothed toric divisor (https://researchseminars.org/talk/GandT/18/)
by Angela Wu (Imperial College) as part of The London geometry and topology seminar

Abstract: TBA

Veronica Fantini (IHES)
2021-02-05 13:30 - 14:30 | https://researchseminars.org/talk/GandT/19/
Title: Scattering diagrams in the extended tropical vertex (https://researchseminars.org/talk/GandT/19/)
by Veronica Fantini (IHES) as part of The London geometry and topology seminar

Abstract: TBA

Nicolas Addington (University of Oregon)
2021-02-12 17:00 - 18:00 | https://researchseminars.org/talk/GandT/20/
Title: Moduli spaces of sheaves on moduli spaces of sheaves (https://researchseminars.org/talk/GandT/20/)
by Nicolas Addington (University of Oregon) as part of The London geometry and topology seminar

Abstract: TBA

Joseph Waldron (MSU)
2021-02-26 13:30 - 14:30 | https://researchseminars.org/talk/GandT/21/
Title: Minimal model program for threefolds of mixed characteristic. (https://researchseminars.org/talk/GandT/21/)
by Joseph Waldron (MSU) as part of The London geometry and topology seminar

Abstract: TBA

Timothy Magee (King’s College)
2021-02-19 13:30 - 14:30 | https://researchseminars.org/talk/GandT/22/
Title: Convexity in tropical spaces and compactifications of cluster varieties. (https://researchseminars.org/talk/GandT/22/)
by Timothy Magee (King’s College) as part of The London geometry and topology seminar

Abstract: TBA

Marco Mendez Guaraco (Imperial College)
2021-03-19 13:30 - 14:30 | https://researchseminars.org/talk/GandT/23/
Title: Multiplicity one of generic stable Allen-Cahn minimal hypersurfaces. (https://researchseminars.org/talk/GandT/23/)
by Marco Mendez Guaraco (Imperial College) as part of The London geometry and topology seminar

Abstract: TBA

Mark Andrea De Cataldo
2021-05-07 12:30 - 13:30 | https://researchseminars.org/talk/GandT/24/
Title: Some things I know and some I don’t about moduli spaces of Higgs bundles (https://researchseminars.org/talk/GandT/24/)
by Mark Andrea De Cataldo as part of The London geometry and topology seminar

Abstract: TBA

Michael Magee
2021-05-14 12:30 - 13:30 | https://researchseminars.org/talk/GandT/25/
Title: Spectral Gaps of Random Covers of Surfaces (https://researchseminars.org/talk/GandT/25/)
by Michael Magee as part of The London geometry and topology seminar

Abstract: TBA

Simon Donaldson
2021-06-11 12:30 - 13:30 | https://researchseminars.org/talk/GandT/27/
Title: Some boundary value and mapping problems involving differential forms (https://researchseminars.org/talk/GandT/27/)
by Simon Donaldson as part of The London geometry and topology seminar

Abstract: TBA

Sergej Monavari
2021-05-28 12:30 - 13:30 | https://researchseminars.org/talk/GandT/28/
Title: Double nested Hilbert schemes and stable pair invariants (https://researchseminars.org/talk/GandT/28/)
by Sergej Monavari as part of The London geometry and topology seminar

Abstract: TBA

Yanki Lekili
2021-06-18 12:30 - 13:30 | https://researchseminars.org/talk/GandT/29/
Title: Towards a mirror to knot Floer homology. (https://researchseminars.org/talk/GandT/29/)
by Yanki Lekili as part of The London geometry and topology seminar

Abstract: TBA

Arkadij Bojko
2021-06-25 12:30 - 13:30 | https://researchseminars.org/talk/GandT/30/
Title: Wall-crossing for Hilbert schemes of fourfolds and Quot-schemes of surfaces (https://researchseminars.org/talk/GandT/30/)
by Arkadij Bojko as part of The London geometry and topology seminar

Abstract: TBA

Mehdi Yazdi
2021-10-15 12:30 - 13:30 | https://researchseminars.org/talk/GandT/31/
Title: The fully marked surface theorem (https://researchseminars.org/talk/GandT/31/)
by Mehdi Yazdi as part of The London geometry and topology seminar

Abstract: TBA

Lewis Topley
2021-10-22 12:30 - 13:30 | https://researchseminars.org/talk/GandT/32/
Title: Finite W-algebras and the orbit method (https://researchseminars.org/talk/GandT/32/)
by Lewis Topley as part of The London geometry and topology seminar

Abstract: TBA

Ruadhaí Dervan
2021-10-29 12:30 - 13:30 | https://researchseminars.org/talk/GandT/33/
Title: Stability conditions for polarised varieties (https://researchseminars.org/talk/GandT/33/)
by Ruadhaí Dervan as part of The London geometry and topology seminar

Abstract: TBA

Fabian Haiden
2021-11-05 13:30 - 14:30 | https://researchseminars.org/talk/GandT/34/
Title: Motivic DT invariants of quadratic differentials. (https://researchseminars.org/talk/GandT/34/)
by Fabian Haiden as part of The London geometry and topology seminar

Abstract: TBA

Nikon Kurnosov
2021-11-12 13:30 - 14:30 | https://researchseminars.org/talk/GandT/35/
Title: Geometry of Bogomolov-Guan manifolds (https://researchseminars.org/talk/GandT/35/)
by Nikon Kurnosov as part of The London geometry and topology seminar

Abstract: TBA

Alastair Craw
2021-11-19 13:30 - 14:30 | https://researchseminars.org/talk/GandT/36/
by Alastair Craw as part of The London geometry and topology seminar

Abstract: TBA

Selim Ghazouani
2021-11-26 13:30 - 14:30 | https://researchseminars.org/talk/GandT/37/
Title: Existence of closed geodesics for affine structures on surfaces. (https://researchseminars.org/talk/GandT/37/)
by Selim Ghazouani as part of The London geometry and topology seminar

Abstract: TBA

Jeff Carlson
2021-12-03 13:30 - 14:30 | https://researchseminars.org/talk/GandT/38/
Title: The topology of the Gelfand–Zeitlin fiber (https://researchseminars.org/talk/GandT/38/)
by Jeff Carlson as part of The London geometry and topology seminar

Abstract: TBA

Rachel Webb
2021-12-10 13:30 - 14:30 | https://researchseminars.org/talk/GandT/39/
Title: Abelianization and quantum lefschetz for orbifold I-functions. (https://researchseminars.org/talk/GandT/39/)
by Rachel Webb as part of The London geometry and topology seminar

Abstract: TBA

John Nicholson
2022-01-21 13:30 - 14:30 | https://researchseminars.org/talk/GandT/41/
Title: 4-manifolds and the homotopy type of a finite 2-complex (https://researchseminars.org/talk/GandT/41/)
by John Nicholson as part of The London geometry and topology seminar

Abstract: TBA

András Juhász
2022-01-28 15:15 - 16:15 | https://researchseminars.org/talk/GandT/42/
Title: Knot theory and machine learning. (https://researchseminars.org/talk/GandT/42/)
by András Juhász as part of The London geometry and topology seminar

Abstract: TBA

Ailsa Keating
2022-02-04 13:30 - 14:30 | https://researchseminars.org/talk/GandT/43/
Title: Symplectomorphisms of some Weinstein 4-manifolds. (https://researchseminars.org/talk/GandT/43/)
by Ailsa Keating as part of The London geometry and topology seminar

Abstract: TBA

Alastair Craw
2022-02-11 13:30 - 14:30 | https://researchseminars.org/talk/GandT/44/
Title: Partial crepant resolutions, punctual Hilbert schemes and ADE singularities. (https://researchseminars.org/talk/GandT/44/)
by Alastair Craw as part of The London geometry and topology seminar

Abstract: TBA

Egor Yasinsky
2022-02-18 13:30 - 14:30 | https://researchseminars.org/talk/GandT/45/
Title: Birational involutions of the projective plane (https://researchseminars.org/talk/GandT/45/)
by Egor Yasinsky as part of The London geometry and topology seminar

Abstract: TBA

Claude Viterbo
2022-02-25 13:30 - 14:30 | https://researchseminars.org/talk/GandT/46/
Title: Completions and coisotropy in symplectic topology (https://researchseminars.org/talk/GandT/46/)
by Claude Viterbo as part of The London geometry and topology seminar

Abstract: TBA

Adam Gal
2022-03-04 13:30 - 14:30 | https://researchseminars.org/talk/GandT/47/
Title: Hall categories and quantum group categorification (https://researchseminars.org/talk/GandT/47/)
by Adam Gal as part of The London geometry and topology seminar

Abstract: TBA

Wicher Malten
2022-03-18 13:30 - 14:30 | https://researchseminars.org/talk/GandT/48/
Title: From braids to transverse slices in reductive groups. (https://researchseminars.org/talk/GandT/48/)
by Wicher Malten as part of The London geometry and topology seminar

Abstract: TBA

Michael McQuillan
2022-03-11 13:30 - 14:30 | https://researchseminars.org/talk/GandT/49/
Title: Thurston Vanishing (https://researchseminars.org/talk/GandT/49/)
by Michael McQuillan as part of The London geometry and topology seminar

Abstract: TBA

Carolina Araujo
2022-03-25 13:30 - 14:30 | https://researchseminars.org/talk/GandT/50/
Title: Higher Fano manifolds (https://researchseminars.org/talk/GandT/50/)
by Carolina Araujo as part of The London geometry and topology seminar

Abstract: TBA

Jakub Witaszek
2022-04-29 12:30 - 13:30 | https://researchseminars.org/talk/GandT/51/
Title: Quasi-F-splittings. (https://researchseminars.org/talk/GandT/51/)
by Jakub Witaszek as part of The London geometry and topology seminar

Abstract: TBA

Hélène Esnault
2022-06-10 12:30 - 13:30 | https://researchseminars.org/talk/GandT/52/
Title: Recent developments on rigid local systems (https://researchseminars.org/talk/GandT/52/)
by Hélène Esnault as part of The London geometry and topology seminar

Abstract: TBA

Richard Thomas
2022-05-06 12:30 - 13:30 | https://researchseminars.org/talk/GandT/53/
Title: Rank r DT theory from rank 1. (https://researchseminars.org/talk/GandT/53/)
by Richard Thomas as part of The London geometry and topology seminar

Abstract: TBA

Alexei Skorobogatov
2022-05-20 12:30 - 13:30 | https://researchseminars.org/talk/GandT/54/
Title: Reduction of Kummer surfaces (https://researchseminars.org/talk/GandT/54/)
by Alexei Skorobogatov as part of The London geometry and topology seminar

Abstract: TBA

Ignacio Barros Reyes
2022-05-27 12:30 - 13:30 | https://researchseminars.org/talk/GandT/55/
Title: The Kodaira classification of the moduli of hyperelliptic curves (https://researchseminars.org/talk/GandT/55/)
by Ignacio Barros Reyes as part of The London geometry and topology seminar

Abstract: TBA

Lenny Taelman
2022-06-17 12:30 - 13:30 | https://researchseminars.org/talk/GandT/56/
Title: Deformations of Calabi–Yau varieties in mixed characteristic (https://researchseminars.org/talk/GandT/56/)
by Lenny Taelman as part of The London geometry and topology seminar

Abstract: TBA

Soheyla Feyzbakhsh
2022-06-24 12:30 - 13:30 | https://researchseminars.org/talk/GandT/57/
Title: Moduli spaces of stable objects in the Kuznetsov component of cubic threefolds (https://researchseminars.org/talk/GandT/57/)
by Soheyla Feyzbakhsh as part of The London geometry and topology seminar

Abstract: TBA

Paul Schwahn
2022-07-01 12:30 - 13:30 | https://researchseminars.org/talk/GandT/58/
Title: Stability and rigidity of normal homogeneous Einstein manifolds. (https://researchseminars.org/talk/GandT/58/)
by Paul Schwahn as part of The London geometry and topology seminar

Abstract: TBA

Qaasim Shafi
2022-05-13 12:30 - 13:30 | https://researchseminars.org/talk/GandT/59/
Title: Logarithmic Toric Quasimaps (https://researchseminars.org/talk/GandT/59/)
by Qaasim Shafi as part of The London geometry and topology seminar

Abstract: TBA

Alexander Petrov
2022-10-14 12:30 - 13:30 | https://researchseminars.org/talk/GandT/60/
Title: Hodge-to-de Rham (non)degeneration in positive characteristic and Steenrod operations (https://researchseminars.org/talk/GandT/60/)
by Alexander Petrov as part of The London geometry and topology seminar

Abstract: TBA

Maxim Jeffs
2022-10-21 12:30 - 13:30 | https://researchseminars.org/talk/GandT/61/
Title: Functorial mirror symmetry for very affine hypersurfaces (https://researchseminars.org/talk/GandT/61/)
by Maxim Jeffs as part of The London geometry and topology seminar

Abstract: TBA

Baris Kartal
2022-10-28 12:30 - 13:30 | https://researchseminars.org/talk/GandT/62/
Title: Frobenius operators in symplectic topology (https://researchseminars.org/talk/GandT/62/)
by Baris Kartal as part of The London geometry and topology seminar

Abstract: TBA

Bogdan Zavyalov
2022-11-11 13:30 - 14:30 | https://researchseminars.org/talk/GandT/63/
Title: Mod-p Poincare Duality in p-adic Analytic Geometry. (https://researchseminars.org/talk/GandT/63/)
by Bogdan Zavyalov as part of The London geometry and topology seminar

Abstract: TBA

Martin Taylor
2022-11-18 13:30 - 14:30 | https://researchseminars.org/talk/GandT/64/
Title: The nonlinear stability of the Schwarzschild family of black holes (https://researchseminars.org/talk/GandT/64/)
by Martin Taylor as part of The London geometry and topology seminar

Abstract: TBA

Denis Auroux
2022-11-25 13:30 - 14:30 | https://researchseminars.org/talk/GandT/65/
Title: Fukaya categories of Landau-Ginzburg models and functoriality in homological mirror symmetry (https://researchseminars.org/talk/GandT/65/)
by Denis Auroux as part of The London geometry and topology seminar

Abstract: TBA

Ben Davison
2022-12-02 13:30 - 14:30 | https://researchseminars.org/talk/GandT/66/
by Ben Davison as part of The London geometry and topology seminar

Abstract: TBA

Markus Upmeier
2022-12-09 12:00 - 13:00 | https://researchseminars.org/talk/GandT/67/
Title: Categorifications of Atiyah-Singer index theory with applications to calibrated geometry and gauge theory (https://researchseminars.org/talk/GandT/67/)
by Markus Upmeier as part of The London geometry and topology seminar

Abstract: TBA

Stephen Lynch
2022-11-04 13:30 - 14:30 | https://researchseminars.org/talk/GandT/68/
Title: Ancient solutions of geometric flows (https://researchseminars.org/talk/GandT/68/)
by Stephen Lynch as part of The London geometry and topology seminar

Abstract: TBA

Dmitry Kaledin
2022-12-16 13:30 - 14:30 | https://researchseminars.org/talk/GandT/69/
Title: How to enhance categories, and why (https://researchseminars.org/talk/GandT/69/)
by Dmitry Kaledin as part of The London geometry and topology seminar

Abstract: TBA

Dennis Sullivan
2023-01-13 15:00 - 16:00 | https://researchseminars.org/talk/GandT/70/
Title: The third exterior power of a d-dimensional vector space is interesting (https://researchseminars.org/talk/GandT/70/)
by Dennis Sullivan as part of The London geometry and topology seminar

Abstract: TBA

Jenia Tevelev
2023-01-13 13:30 - 14:30 | https://researchseminars.org/talk/GandT/71/
Title: Semi-orthogonal decompositions of moduli spaces. (https://researchseminars.org/talk/GandT/71/)
by Jenia Tevelev as part of The London geometry and topology seminar

Abstract: TBA

André Belotto da Silva
2023-01-20 13:30 - 14:30 | https://researchseminars.org/talk/GandT/72/
Title: Partial desingularization (https://researchseminars.org/talk/GandT/72/)
by André Belotto da Silva as part of The London geometry and topology seminar

Abstract: TBA
