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20242026
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math.SG2026

On orderability and the chord conjecture

Egor Shelukhin

We prove Arnol'd's chord conjecture for a large new class of contact manifolds: for every contact form and every closed Legendrian submanifold there exists a non-constant Reeb chor…

math.SG2026

Resonances and string point invertibility for compact rank one symmetric spaces

Kai Cieliebak, Alexandru Oancea, Egor Shelukhin

We calculate the Batalin-Vilkovisky (BV) algebra structure of Rabinowitz loop homology for compact rank one symmetric spaces. As a consequence, we prove that such a space satisfies…

math.SG2026

Quantum Steenrod powers and Hamiltonian maps

Shaoyun Bai, Egor Shelukhin, Nicholas Wilkins +1

The paper proves new results about periodic points of Hamiltonian diffeomorphisms on closed symplectic manifolds, linking properties like pseudo‑rotations and symplectically degene…

math.SG2025

Weinstein exactness of nearby Lagrangians and related questions

Marcelo S. Atallah, Jean-Philippe Chassé, Rémi Leclercq +1

We address the following problem: if a Hamiltonian diffeomorphism maps a Lagrangian submanifold to a small Weinstein neighborhood of , is the image necessarily Hamiltonian i…

math.SG2025

A dichotomy for the Hofer growth of area preserving maps on the sphere via symmetrization

Lev Buhovsky, Ben Feuerstein, Leonid Polterovich +1

We prove that autonomous Hamiltonian flows on the two-sphere exhibit the following dichotomy: the Hofer norm either grows linearly or is bounded in time by a universal constant C.…

math.SG2025

Non-orderability and the contact Hofer norm

Jakob Hedicke, Egor Shelukhin

We relate non-orderability in contact topology to shortening in the contact Hofer norm. Combined with considerations of open books, this provides many new examples of non-orderable…