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We consider a class of Lagrangian sections $L$ contained in certain Calabi-Yau Lagrangian fibrations (mirrors of toric weak Fano manifolds). We prove that a form of the Thomas-Yau conjecture holds in this case: $L$ is Hamiltonian isotopic…

Differential Geometry · Mathematics 2025-05-22 Jacopo Stoppa

This paper explores homological mirror symmetry for weighted blowups of toric varieties. It will be shown that both the A-model and B-model categories have natural semiorthogonal decompositions. An explicit equivalence of the right…

Algebraic Geometry · Mathematics 2007-05-23 Gabriel D. Kerr

We give a proof of the results of Chapuy and Douvropoulos [3] for irreducible spetsial reflection groups based on Deligne-Lusztig combinatorics. In particular, if f denotes the truncated Lusztig Fourier transform, we show that the image by…

Representation Theory · Mathematics 2023-04-25 Jean Michel

The nonequivariant coherent-costructible correspondence is a microlocal-geometric interpretation of homological mirror symmetry for toric varieties conjectured by Fang-Liu-Treumann-Zaslow. We prove a generalization of this conjecture for a…

Symplectic Geometry · Mathematics 2020-12-16 Tatsuki Kuwagaki

The derived categories of toric varieties admit semi-orthogonal decompositions coming from wall-crossing in GIT. We prove that these decompositions satisfy a Jordan-Holder property: the subcategories that appear, and their multiplicities,…

Algebraic Geometry · Mathematics 2022-02-03 Alex Kite , Ed Segal

We extend the usual projective Abel-Radon transform to the larger context of a smooth complete toric variety X. We define and study toric concavity attached to an algebraic splitting vector bundle on X and we prove a toric version of the…

Complex Variables · Mathematics 2009-03-27 Martin Weimann

We apply the methods of C{\u{a}}ld{\u{a}}raru to construct a twisted Fourier-Mukai transform between a pair of holomorphic symplectic four-folds. More precisely, we obtain an equivalence between the derived category of coherent sheaves on a…

Algebraic Geometry · Mathematics 2009-04-03 Justin Sawon

For a smooth projective variety whose anti-canonical bundle is nef, we prove confluence of the small $K$-theoretic $J$-function, i.e., after rescaling appropriately the Novikov variables, the small $K$-theoretic $J$-function has a limit…

Algebraic Geometry · Mathematics 2024-04-10 Todor Milanov , Alexis Roquefeuil

The classification of Fano varieties is an important open question, motivated in part by the MMP. Smooth Fano varieties have been classified up to dimension three: one interesting feature of this classification is that they can all be…

Algebraic Geometry · Mathematics 2024-04-03 Elana Kalashnikov

We prove that the Deligne-Lusztig varieties associated to elements of the Weyl group which are of minimal length in their twisted class are affine. Our proof differs from the proof of He and Orlik-Rapoport and it is inspired by the case of…

Algebraic Geometry · Mathematics 2007-12-03 Cédric Bonnafé , Raphaël Rouquier

For an in invertible quasihomogeneous singularity $w$ we prove an all-genus mirror theorem establishing an isomorphism between two cohomological field theories. On the $B$-side it is the Saito-Givental theory given by a certain choice of a…

Algebraic Geometry · Mathematics 2022-08-02 Weiqiang He , Alexander Polishchuk , Yefeng Shen , Arkady Vaintrob

The central fiber of a Gross-Siebert type toric degeneration is known to satisfy homological mirror symmetry: its category of coherent sheaves is equivalent to the wrapped Fukaya category of a certain exact symplectic manifold. Here we show…

Symplectic Geometry · Mathematics 2024-09-13 Vivek Shende

In this paper, we describe explicit relations in the symplectomorphism groups of toric hypersurfaces. To define the elements involved, we construct a proper stack of toric hypersurfaces with compactifying boundary representing toric…

Symplectic Geometry · Mathematics 2015-12-03 Colin Diemer , Ludmil Katzarkov , Gabriel Kerr

We give a complete classification of the torus-equivariant birational equivalence classes of smooth proper toric Deligne-Mumford stacks with trivial generic stabilizer in terms of their associated stacky fans.

Algebraic Geometry · Mathematics 2023-08-22 Johannes Schmitt

It is proved that an homogeneous toric bundles over a flag manifold G^\C/P admits a Kaehler-Ricci solitonic metric if and only if it is Fano. In particular, an homogeneous toric bundle of this kind is Kaehler-Einstein if and only if it is…

Differential Geometry · Mathematics 2007-05-23 Fabio Podesta' , Andrea Spiro

We introduce a category of filtered sheaves on a circle to describe the Stokes phenomenon of linear difference equations with mild singularity. The main result is a mild difference analog of the Riemann-Hilbert correspondence for germs of…

Algebraic Geometry · Mathematics 2026-04-21 Yota Shamoto

We construct a `weak' version EM^w(K) of Lack & Street's 2-category of monads in a 2-category K, by replacing their compatibility constraint of 1-cells with the units of monads by an additional condition on the 2-cells. A relation between…

Category Theory · Mathematics 2012-01-27 Gabriella Böhm

This is a review of the theory of toric Landau-Ginzburg models - the effective approach to mirror symmetry for Fano varieties. We mainly focus on the cases of dimensions 2 and 3, as well as on the case of complete intersections in weighted…

Algebraic Geometry · Mathematics 2019-05-22 Victor Przyjalkowski

We prove that the tangent space to the $(n+1)$-th Milnor $K$-group of a ring $R$ is isomorphic to group of $n$-th absolute K\"ahler differentials of $R$ when the ring $R$ contains $\frac{1}{2}$ and has sufficiently many invertible elements.…

Algebraic Geometry · Mathematics 2015-09-29 S. O. Gorchinskiy , D. V. Osipov

We prove that the Seidel morphism of $(M \times M', \omega \oplus \omega')$ is naturally related to the Seidel morphisms of $(M,\omega)$ and $(M',\omega')$, when these manifolds are monotone. We deduce that any homotopy class of loops of…

Symplectic Geometry · Mathematics 2009-10-29 Rémi Leclercq
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