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We give a method to construct singular Lagrangian 3-torus fibrations over certain a priori given integral affine manifolds with singularities, which we call simple. The main result of this article is the proof that the topological…

Symplectic Geometry · Mathematics 2009-08-07 R. Castano-Bernard , D. Matessi

Given some type of fibration on a 4-manifold $X$ with a torus regular fiber $T$, we may produce a new 4-manifold $X_T$ by performing torus surgery on $T$. There is a natural way to extend the fibration to $X_T$, but a multiple fiber…

Geometric Topology · Mathematics 2015-02-25 Kyle Larson

This paper is a continuation of our paper math.AG/0205321 where we have built a combinatorial model for the torus fibrations of Calabi-Yau toric hypersurfaces. This part addresses the connection between the model torus fibration and the…

Algebraic Geometry · Mathematics 2007-05-23 Christian Haase , Ilia Zharkov

We give a construction of Lagrangian torus fibrations with controlled discriminant locus on certain affine varieties. In particular, we apply our construction in the following ways. We find a Lagrangian torus fibration on the 3-fold…

Symplectic Geometry · Mathematics 2020-08-05 Jonathan David Evans , Mirko Mauri

The affine line minus one point is the underlying space of the algebraic torus of dimension one. However the fibration of an affine algebraic threefold by the affine line minus one point is not always the quotient morphism of the threefold…

Algebraic Geometry · Mathematics 2012-11-09 R. V. Gurjar , M. Koras , K. Masuda , M. Miyanishi , P. Russell

Let X be a smooth elliptic fibration over a smooth base B. Under mild assumptions, we establish a Fourier-Mukai equivalence between the derived categories of two objects, each of which is an O^* gerbe over a genus one fibration which is a…

Algebraic Geometry · Mathematics 2007-05-23 Ron Donagi , Tony Pantev

We consider regular Calabi-Yau hypersurfaces in $N$-dimensional smooth toric varieties. On such a hypersurface in the neighborhood of the large complex structure limit point we construct a fibration over a sphere $S^{N-1}$ whose generic…

Algebraic Geometry · Mathematics 2007-05-23 Ilia Zharkov

Using torus fibrations over K3 orbisurfaces, we construct new smooth solutions to the $G_2$ Hull-Strominger system. These manifolds arise as total spaces of principal $T^3$ (orbi)bundles over singular K3 surfaces. Our construction is based…

Differential Geometry · Mathematics 2026-01-29 Anna Fino , Gueo Grantcharov , Jose Medel

A topological space is called self-covering if it is a nontrivial cover of itself. We prove that, under mild assumptions, a closed self-covering manifold with an abelian fundamental group fibers over a torus in various senses. As a…

Geometric Topology · Mathematics 2025-10-29 Lizhen Qin , Yang Su

We describe a simple way of constructing torus fibrations $T^3\to X\to S^3$ which degenerate canonically over a knot or link in $S^3$. We show that the topological invariants of $X$ can be computed algebraically from the monodromy…

Differential Geometry · Mathematics 2007-05-23 P Baier

We lift the stratified torus fibration over a fanifold constructed by Gammage--Shende to the associated Weinstein manifold-with-boundary, which is homotopic to a filtered stratified integrable system with noncompact fibers. When the…

Symplectic Geometry · Mathematics 2024-11-04 Hayato Morimura

There exists a smooth foliation with 3 singular points on the two-dimensional torus such that any lifting of a leaf of this foliation on the universal covering of the torus is a dense subset of the covering.

Geometric Topology · Mathematics 2007-05-23 Dmitri Panov

We describe in purely combinatorial terms dual pairs of integral affine structures on spheres which come from the conjectural metric collapse of mirror families of Calabi-Yau toric hypersurfaces. The same structures arise on the base of a…

Algebraic Geometry · Mathematics 2007-05-23 Christian Haase , Ilia Zharkov

We describe complex twistor spaces over inner 3-symmetric spaces $G/H$, such that $H$ acts transitively on the fibre. Like in the symmetric case, these are flag manifolds $G/K$ where $K$ is the centralizer of a torus in $G$. Moreover, they…

Differential Geometry · Mathematics 2014-02-26 Jean-Baptiste Butruille

In this article we classify up to isotopy tight contact structures on Seifert manifolds over the torus with one singular fibre.

Geometric Topology · Mathematics 2014-10-01 Paolo Ghiggini

The compact complex manifolds considered in this article are principal torus bundles over a torus. We consider the Kodaira Spencer map of the complete Appell Humbert family (introduced by the first author in Part I) and are able to show…

Complex Variables · Mathematics 2007-05-23 Fabrizio Catanese , Paola Frediani

By the SYZ construction, a mirror pair $(X,\check{X})$ of a complex torus $X$ and a mirror partner $\check{X}$ of the complex torus $X$ is described as the special Lagrangian torus fibrations $X \rightarrow B$ and $\check{X} \rightarrow B$…

Differential Geometry · Mathematics 2020-07-07 Kazushi Kobayashi

We study stringy modifications of $T^3$-fibered manifolds, where the fiber undergoes a monodromy in the T-duality group. We determine the fibration data defining such T-folds from a geometric model, by using a map between the duality group…

High Energy Physics - Theory · Physics 2018-12-26 Ismail Achmed-Zade , Mark J. D. Hamilton , Dieter Lust , Stefano Massai

In this paper, we describe a new surprising example of a fibration of the Clifford torus S3 x S3 in the 7-sphere by great 3-spheres, which is fiberwise homogeneous but whose fibers are not parallel to one another. In particular it is not…

Differential Geometry · Mathematics 2014-07-21 Haggai Nuchi

We study a natural generalization of inverse systems of finite regular covering spaces. A limit of such a system is a fibration whose fibres are profinite topological groups. However, as shown in a previous paper (Conner-Herfort-Pavesic:…

Algebraic Topology · Mathematics 2019-01-09 Gregory R. Conner , Wolfgang Herfort , Petar Pavešić
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