Nearby Lagrangian conjecture

Unsolved problem in mathematics
Prove or disprove: Any closed exact Lagrangian submanifold of the cotangent bundle of a closed manifold is Hamiltonian isotopic to the zero section.

In mathematics, more specifically symplectic topology, the nearby Lagrangian conjecture, is an open[1] mathematical problem often attributed to Vladimir Arnold. It states that every closed exact Lagrangian submanifold of a cotangent bundle T∗M (with symplectic structure) is Hamiltonian isotopic to the zero section.[2][3][4]

It is closely related to the theory of generating functions.[5]

References

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  1. ^ https://celebratio.org/Eliashberg_Y/article/1188/
  2. ^ Cieliebak, K., Eliashberg, Y. "New Applications of Symplectic Topology in Several Complex Variables". J Geom Anal 31, 3252–3271 (2021). https://doi.org/10.1007/s12220-020-00395-1
  3. ^ Ekholm, Tobias, Thomas Kragh, and Ivan Smith. "Lagrangian exotic spheres." Journal of Topology and Analysis 8.03 (2016): 375-397. https://doi.org/10.1142/S1793525316500199
  4. ^ "The nearby Lagrangian conjecture | Math".
  5. ^ Abouzaid, M., Courte, S., Guillermou, S., & Kragh, T. (2025). "Twisted generating functions and the nearby Lagrangian conjecture". Duke Mathematical Journal, 174(5). https://doi.org/10.1215/00127094-2024-0052 https://arxiv.org/abs/2011.13178