Journal of Symplectic Geometry

Volume 17 (2019)

Number 3

Hamiltonian stationary Lagrangian fibrations

Pages: 753 – 791



Eveline Legendre (Institut de Mathématiques de Toulouse, France)

Yann Rollin (Laboratoire Jean Leray, Faculté des Sciences et des Techniques, Université de Nantes, France)


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 Kähler 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 Kähler geometry. In this paper, we obtain a large class of examples by deforming the toric metrics into non-toric almost Kähler metrics, together with HSLAG submanifolds.

Accepted 25 July 2018

Published 9 September 2019