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We use the differential geometrical framework of generalized (almost) Calabi-Yau structures to reconsider the concept of mirror symmetry. It is shown that not only the metric and B-field but also the algebraic structures are uniquely…

High Energy Physics - Theory · Physics 2007-05-23 Claus Jeschek

We consider orientifolds of Calabi-Yau 3-folds in the context of Type IIA and Type IIB superstrings. We show how mirror symmetry can be used to sum up worldsheet instanton contributions to the superpotential for Type IIA superstrings. The…

High Energy Physics - Theory · Physics 2007-05-23 Bobby Acharya , Mina Aganagic , Kentaro Hori , Cumrun Vafa

We present a new construction of mirror pairs of Calabi-Yau manifolds by smoothing normal crossing varieties, consisting of two quasi-Fano manifolds. We introduce a notion of mirror pairs of quasi-Fano manifolds with anticanonical…

Algebraic Geometry · Mathematics 2019-12-12 Nam-Hoon Lee

Hodge-theoretic mirror symmetry for a Calabi-Yau mirror pair says that the variation of Hodge structure arising from quantum cohomology of a Calabi-Yau manifold and that arising from deformation of complex structures on the dual Calabi-Yau…

Algebraic Geometry · Mathematics 2023-08-01 Hiroshi Iritani

This is a very short and elementary introduction to G_2 manifolds. We stress the similarities and the differences with K\"ahler manifolds in general and with Calabi-Yau manifolds in particular.

Differential Geometry · Mathematics 2011-04-13 Spiro Karigiannis

We prove that the inverse of a mirror map for a toric Calabi-Yau manifold of the form $K_Y$, where $Y$ is a compact toric Fano manifold, can be expressed in terms of generating functions of genus 0 open Gromov-Witten invariants defined by…

Symplectic Geometry · Mathematics 2014-02-19 Kwokwai Chan , Siu-Cheong Lau , Hsian-Hua Tseng

This paper continues the authors' program of studying mirror symmetry via log geometry and toric degenerations, relating affine manifolds with singularities, log Calabi-Yau spaces, and toric degenerations of Calabi-Yaus. The main focus of…

Algebraic Geometry · Mathematics 2009-12-08 Mark Gross , Bernd Siebert

The moduli dependence of $(2,2)$ superstring compactifications based on Calabi--Yau hypersurfaces in weighted projective space has so far only been investigated for Fermat-type polynomial constraints. These correspond to Landau-Ginzburg…

High Energy Physics - Theory · Physics 2014-11-18 P. Berglund , S. Katz , A. Klemm

FJRW theory is a formulation of physical Landau-Ginzburg models with a rich algebraic structure, rooted in enumerative geometry. As a consequence of a major physical conjecture, called the Landau-Ginzburg/Calabi-Yau correspondence, several…

Algebraic Geometry · Mathematics 2019-11-13 Amanda Francis , Nathan Priddis , Andrew Schaug

In this paper, we study the form type Calabi-Yau equation. We define the astheno-Ricci curvature and prove that there exists a solution for the form type Calabi-Yau equation if the astheno-Ricci curvature is non-positive.

Differential Geometry · Mathematics 2024-06-24 Liding Huang

We give a brief survey on the entropy of holomorphic self maps $f$ of compact K\"ahler manifolds, and rational dominating self maps $f$ of smooth projective varieties. We emphasize the connection between the entropy and the spectral radii…

Dynamical Systems · Mathematics 2016-09-07 Shmuel Friedland

We prove a version of homological mirror symmetry statement for toric Calabi-Yau $3$-orbifolds, thus extending arXiv:1604.06448 to the case of orbifolds under the mirror symmetry setting considered in arXiv:1604.07123. The B-model is the…

Algebraic Topology · Mathematics 2022-04-27 Qingyuan Bai , Bohan Fang

We consider a class of Calabi-Yau compactifications which are constructed as a complete intersection in weighted projective space. For manifolds with one K\"ahler modulus we construct the mirror manifolds and calculate the instanton sum.

High Energy Physics - Theory · Physics 2010-11-01 A. Klemm , S. Theisen

A notion of asymptotically conical K\"ahler orbifold is introduced, and, following previous existence results in the setting of asymptotically conical manifolds, it is shown that a certain complex Monge-Amp\'ere equation admits a rapidly…

Complex Variables · Mathematics 2022-02-18 Mitchell Faulk

Motivated by SU(3) structure compactifications, we show explicitly how to construct half--flat topological mirrors to Calabi--Yau manifolds with NS fluxes. Units of flux are exchanged with torsion factors in the cohomology of the mirror;…

High Energy Physics - Theory · Physics 2009-11-11 Alessandro Tomasiello

We survey some recent developments on the problem of understanding degenerations of Calabi-Yau manifolds equipped with their Ricci-flat Kahler metrics, with an emphasis on the case when the metrics are volume collapsing.

Differential Geometry · Mathematics 2020-05-08 Valentino Tosatti

Recently, at least 50 million of novel examples of compact $G_2$ holonomy manifolds have been constructed as twisted connected sums of asymptotically cylindrical Calabi-Yau threefolds. The purpose of this paper is to study mirror symmetry…

High Energy Physics - Theory · Physics 2017-06-07 Andreas P. Braun , Michele Del Zotto

The paper contains a proof that elliptic genus of a Calabi-Yau manifold is a Jacobi form, finds in which dimensions the elliptic genus is determined by the Hodge numbers and shows that elliptic genera of a Calabi-Yau hypersurface in a toric…

Algebraic Geometry · Mathematics 2009-10-31 Lev A. Borisov , Anatoly Libgober

We study mirror symmetry of a family of Calabi-Yau manifolds fibered by (1,8)-polarized abelian surfaces with Euler characteristic zero. By describing the parameter space globally, we find all expected boundary points (LCSLs), including…

Algebraic Geometry · Mathematics 2022-01-24 Shinobu Hosono , Hiromichi Takagi

Calabi--Yau manifolds have risen to prominence in algebraic geometry, in part because of mirror symmetry and enumerative geometry. After Bershadsky--Cecotti--Ooguri--Vafa (BCOV), it is expected that genus 1 curve counting on a Calabi--Yau…

Algebraic Geometry · Mathematics 2023-02-22 Dennis Eriksson , Gerard Freixas i Montplet , Christophe Mourougane