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We construct an I-function for toric bundles obtained as a fiberwise GIT quotient of a (not necessarily split) vector bundle. This is a generalization of Brown's I-function for split toric bundles and the I-function for non-split projective…

Algebraic Geometry · Mathematics 2024-06-25 Yuki Koto

A flag manifold over a semifield K can be partitioned into "half i-circles" which are orbits of a K-action on that flag manifold. Here i is fixed and it corresponds to a simple reflection in the Weyl group. We prove (for certain K) a…

Representation Theory · Mathematics 2022-12-21 G. Lusztig

We consider when a smooth vector bundle endowed with a connection possesses non-trivial, local parallel sections. This is accomplished by means of a derived flag of subsets of the bundle. The procedure is algebraic and rests upon the…

Differential Geometry · Mathematics 2008-04-11 Richard Atkins

Given a smooth projective variety $X$ with a smooth nef divisor $D$ and a positive integer $r$, we construct an $I$-function, an explicit slice of Givental's Lagrangian cone, for Gromov--Witten theory of the root stack $X_{D,r}$. As an…

Algebraic Geometry · Mathematics 2019-12-02 Honglu Fan , Hsian-Hua Tseng , Fenglong You

Given a smooth projective variety $X$ with a simple normal crossing divisor $D:=D_1+D_2+...+D_n$, where $D_i\subset X$ are smooth, irreducible and nef. We prove a mirror theorem for multi-root stacks $X_{D,\vec r}$ by constructing an…

Algebraic Geometry · Mathematics 2022-11-04 Hsian-Hua Tseng , Fenglong You

The SYZ conjecture suggests a folklore that "Lagrangian multi-sections are mirror to holomorphic vector bundles". In this paper, we prove this folklore for Lagrangian multi-sections inside the cotangent bundle of a vector space, which are…

Symplectic Geometry · Mathematics 2024-03-04 Yong-Geun Oh , Yat-Hin Suen

We explain how A. Givental's mirror symmetric family to the type A flag variety and its proposed generalization to partial flag varieties by Batyrev, Ciocan-Fontanine, Kim and van Straten relate to the Peterson variety Y in SL_n/B. We then…

Algebraic Geometry · Mathematics 2007-05-23 Konstanze Rietsch

We construct an I-function of the projective bundle P(V) associated with a not necessarily split vector bundle V\to B as a Fourier transform of the S^1-equivariant J-function of the total space of V and show that it lies on the Givental…

Algebraic Geometry · Mathematics 2026-02-03 Hiroshi Iritani , Yuki Koto

Let G be a simple simply connected complex algebraic group. We give a Lie theoretic construction of a conjectural mirror family associated to a general flag variety G/P, and show that it recovers the Peterson variety presentation for the…

Algebraic Geometry · Mathematics 2007-08-22 Konstanze Rietsch

We establish a noncommutative generalisation of the Borel-Weil theorem for the Heckenberger-Kolb calculi of the irreducible quantum flag manifolds $\mathcal{O}_q(G/L_S)$, generalising previous work of a number of authors (including the…

Quantum Algebra · Mathematics 2021-12-08 Alessandro Carotenuto , Fredy Díaz García , Réamonn Ó Buachalla

We present here some conjectures on the diagonalizability of uniform principal bundles on rational homogeneous spaces, that are natural extensions of classical theorems on uniform vector bundles on the projective space, and study the…

Algebraic Geometry · Mathematics 2025-04-01 Roberto Muñoz , Gianluca Occhetta , Luis E. Solá Conde

We prove a genus zero Givental-style mirror theorem for all complete intersections in proper toric Deligne-Mumford stacks, which provides an explicit slice called big $I-$function on Givental's Lagrangian cone for such targets. In…

Algebraic Geometry · Mathematics 2025-04-16 Jun Wang

We study Givental's Lagrangian cone for the quantum orbifold cohomology of toric stack bundles and prove that the I-function gives points in the Lagrangian cone, namely we construct an explicit slice of the Lagrangian cone defined by the…

Algebraic Geometry · Mathematics 2017-02-27 Yunfeng Jiang , Hsian-Hua Tseng , Fenglong You

We express the diagonals of projective, Grassmann and, more generally, flag bundles of type (A) using the zero schemes of some vector bundle sections, and do the same for their single point subschemes. We discuss diagonal and point…

Algebraic Geometry · Mathematics 2015-12-31 Shizuo Kaji , Piotr Pragacz

We introduce a superpotential for partial flag varieties of type $A$. This is a map $W: Y^\circ \to \mathbb{C}$, where $Y^\circ$ is the complement of an anticanonical divisor on a product of Grassmannians. The map $W$ is expressed in terms…

Algebraic Geometry · Mathematics 2020-11-17 Elana Kalashnikov

We propose, motivate and give evidence for a relation between the $\mathcal D$-modules of the quantum cohomology of a smooth complex projective manifold $X$ and a projective bundle $\PP(\oplus L_i)$ over $X$.

Algebraic Geometry · Mathematics 2007-05-23 Artur Elezi

We use the formal affine Demazure algebra to construct an explicit Leray-Hirsch Theorem for torus equivariant oriented cohomology of flag varieties. We then generalize the Borel model of such theory to partial flag varieties.

Algebraic Geometry · Mathematics 2025-06-13 J. Matthew Douglass , Changlong Zhong

Let L be a preprojective algebra of Dynkin type, and let G be the corresponding complex semisimple simply connected algebraic group. We study rigid modules in subcategories sub(Q) for Q an injective L-module, and we introduce a mutation…

Representation Theory · Mathematics 2019-03-05 Christof Geiss , Bernard Leclerc , Jan Schröer

We generalize our theorems in "Mirror Principle I" to a class of balloon manifolds. Many of the results are proved for convex projective manifolds. In a subsequent paper, Mirror Principle III, we will extend the results to projective…

Algebraic Geometry · Mathematics 2007-05-23 Bong H. Lian , Kefeng Liu , S. T. Yau

We obtain A- and B- series of flag manifolds for T-equivariant tangent bundles and equivariant Chern polynomial following the arguments of Lian, Liu, Yau.

Algebraic Geometry · Mathematics 2007-05-23 Vehbi Emrah Paksoy
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