Hamiltonian stationary Lagrangian fibrations

TL;DR

This paper explores Hamiltonian stationary Lagrangian fibrations, demonstrating their frequent occurrence and providing new examples through deformation of toric Kähler metrics into non-toric almost Kähler metrics.

Contribution

It introduces a large class of HSLAG fibrations by deforming toric metrics, expanding the known examples beyond special Lagrangians.

Findings

HSLAG fibrations are more common than special Lagrangians.

Many examples are constructed via deformation of toric Kähler metrics.

The paper provides explicit new examples of HSLAG submanifolds.

Abstract

Hamiltonian stationary Lagrangian submanifolds (HSLAG) are a natural generalization of special Lagrangian manifolds (SLAG). The latter only make sense on Calabi-Yau manifolds whereas the former are defined for any almost K\"ahler manifold. Special Lagrangians, and, more specificaly, fibrations by special Lagrangians play an important role in the context of the geometric mirror symmetry conjecture. However, these objects are rather scarce in nature. On the contrary, we show that HSLAG submanifolds, or fibrations, arise quite often. Many examples of HSLAG fibrations are provided by toric K\"ah-ler geometry. In this paper, we obtain a large class of examples by deforming the toric metrics into non toric almost K\"ahler metrics, together with HSLAG submanifolds.