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For all punctured Riemann surfaces arising as mirror curves of toric Calabi--Yau threefolds, we show that their symplectic cohomology is isomorphic to the compactly supported Hochschild cohomology of the noncommutative Landau--Ginzburg…

Symplectic Geometry · Mathematics 2025-11-11 Dahye Cho , Hansol Hong , Hyeongjun Jin , Sangwook Lee

The n-dimensional pair of pants is defined to be the complement of n+2 generic hyperplanes in CP^n. We construct an immersed Lagrangian sphere in the pair of pants and compute its endomorphism A_{\infty} algebra in the Fukaya category. On…

Symplectic Geometry · Mathematics 2017-09-27 Nicholas Sheridan

This paper gives a new way of constructing Landau-Ginzburg mirrors using deformation theory of Lagrangian immersions motivated by the works of Seidel, Strominger-Yau-Zaslow and Fukaya-Oh-Ohta-Ono. Moreover we construct a canonical functor…

Symplectic Geometry · Mathematics 2015-03-17 Cheol-Hyun Cho , Hansol Hong , Siu-Cheong Lau

Mirror symmetry for a toric variety involves Laurent polynomials whose symplectic topology is related to the algebraic geometry of the toric variety. We show that there is a monodromy action on the monomially admissible Fukaya-Seidel…

Symplectic Geometry · Mathematics 2019-03-19 Andrew Hanlon

We introduce the notion of tight homomorphism into a locally compact group with nonvanishing bounded cohomology and study these homomorphisms in detail when the target is a Lie group of Hermitian type. Tight homomorphisms between Lie groups…

Differential Geometry · Mathematics 2008-09-15 Marc Burger , Alessandra Iozzi , Anna Wienhard

We complete the discrete cluster categories of type $\mathbb{A}$ as defined by Igusa and Todorov, by embedding such a discrete cluster category inside a larger one, and then taking a certain Verdier quotient. The resulting category is a…

Representation Theory · Mathematics 2021-02-03 Charles Paquette , Emine Yildirim

We study cluster algebras with principal and arbitrary coefficient systems that are associated to unpunctured surfaces. We give a direct formula for the Laurent polynomial expansion of cluster variables in these cluster algebras in terms of…

Representation Theory · Mathematics 2008-09-18 Ralf Schiffler

We show that for singular hypersurfaces, a version of their genus-zero Gromov-Witten theory may be described in terms of a direct limit of fixed point Floer cohomology groups, a construction which is more amenable to computation and easier…

Symplectic Geometry · Mathematics 2023-07-18 Maxim Jeffs , Yuan Yao , Ziwen Zhao

This paper describes constructions in homological algebra that are part of a strategy whose goal is to understand and classify symplectic mapping tori. More precisely, given a dg category and an auto-equivalence, satisfying certain…

Symplectic Geometry · Mathematics 2021-07-13 Yusuf Barış Kartal

We introduce the wrapped Donaldson-Fukaya category of a (generalized) semi-toric SYZ fibration with Lagrangian section satisfying a tameness condition at infinity. Examples include the Gross fibration on the complement of an anti-canonical…

Symplectic Geometry · Mathematics 2022-04-12 Yoel Groman

The Nadler--Zaslow correspondence famously identifies the finite-dimensional Floer homology groups between Lagrangians in cotangent bundles with the finite-dimensional Hom spaces between corresponding constructible sheaves. We generalize…

Symplectic Geometry · Mathematics 2023-12-12 Sheel Ganatra , John Pardon , Vivek Shende

We give a geometric interpretation of cluster varieties in terms of blowups of toric varieties. This enables us to provide, among other results, an elementary geometric proof of the Laurent phenomenon for cluster algebras (of geometric…

Algebraic Geometry · Mathematics 2014-04-16 Mark Gross , Paul Hacking , Sean Keel

We study a twisted version of Fraser, Lam, and Le's higher boundary measurement map, using face weights instead of edge weights, thereby providing Laurent polynomial expansions, in Pl\"ucker coordinates, for twisted web immanants for…

Combinatorics · Mathematics 2026-04-10 Esther Banaian , Elise Catania , Christian Gaetz , Miranda Moore , Gregg Musiker , Kayla Wright

We formalize the way in which one can think about cluster algebras of infinite rank by showing that every rooted cluster algebra of infinite rank can be written as a colimit of rooted cluster algebras of finite rank. Relying on the proof of…

Representation Theory · Mathematics 2017-07-20 Sira Gratz

The homogeneous coordinate ring of the Grassmannian Gr(k,n) has a cluster structure defined in terms of planar diagrams known as Postnikov diagrams. The cluster corresponding to such a diagram consists entirely of Pluecker coordinates. We…

Combinatorics · Mathematics 2020-12-21 Bethany Marsh , Jeanne Scott

We study the deformation theory of the Stanley-Reisner rings associated to cluster complexes for skew-symmetrizable cluster algebras of geometric and finite cluster type. In particular, we show that in the skew-symmetric case, these cluster…

Algebraic Geometry · Mathematics 2025-03-03 Nathan Ilten , Alfredo Nájera Chávez , Hipolito Treffinger

We construct Grassmannian categories of infinite rank, providing an infinite analogue of the Grassmannian cluster categories introduced by Jensen, King, and Su. Each Grassmannian category of infinite rank is given as the category of graded…

Representation Theory · Mathematics 2023-01-31 Jenny August , Man-Wai Cheung , Eleonore Faber , Sira Gratz , Sibylle Schroll

We prove that the wrapped Fukaya category of a punctured sphere ($S^2$ with an arbitrary number of points removed) is equivalent to the triangulated category of singularities of a mirror Landau-Ginzburg model, proving one side of the…

Algebraic Geometry · Mathematics 2014-05-14 Mohammed Abouzaid , Denis Auroux , Alexander I. Efimov , Ludmil Katzarkov , Dmitri Orlov

Cluster categories were introduced in 2006 by Buan-Marsh-Reineke-Reiten-Todorov in order to categorify acyclic cluster algebras without coefficients. Their construction was generalized by Amiot (2009) and Plamondon (2011) to arbitrary…

Representation Theory · Mathematics 2023-04-11 Yilin Wu

Geiss, Leclerc and Schr\"oer introduced a class of 1-Iwanaga-Gorenstein algebras $H$ associated to symmetrizable Cartan matrices with acyclic orientations, generalizing the path algebras of acyclic quivers. They also proved that…

Representation Theory · Mathematics 2025-12-11 Lang Mou , Xiuping Su