Geodesic
On the Geometry of Lagrangian Submanifolds
Matematičeskie zametki, Tome 69 (2001) no. 1, pp. 36-51.

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We prove that a Lagrangian submanifold passes through each point of a symplectic manifold in the direction of arbitrary Lagrangian plane at this point. Generally speaking, such a Lagrangian submanifold is not unique; nevertheless, the set of all such submanifolds in Hermitian extension of a symplectic manifold of dimension greater than 4 for arbitrary initial data contains a totally geodesic submanifold (which we call the $s$-Lagrangian submanifold) if this symplectic manifold is a complex space form. We show that each Lagrangian submanifold in a complex space form of holomorphic sectional curvature equal to $c$ is a space of constant curvature $c/4$. We apply these results to the geometry of principal toroidal bundles. 
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V. F. Kirichenko. On the Geometry of Lagrangian Submanifolds. Matematičeskie zametki, Tome 69 (2001) no. 1, pp. 36-51. http://geodesic.mathdoc.fr/item/MZM_2001_69_1_a3/

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