Non-contractibility conjecture for non-Hamiltonian subcircle actions
Non-contractibility conjecture for non-Hamiltonian subcircle actions
Let an -dimensional torus act symplectically on a -dimensional closed connected symplectic manifold . Let be the rank of the two-form from the paper's preceding result, and assume
Non-contractibility conjecture. Then for every non-Hamiltonian subcircle action of , the orbits of the circle action and all of their iterates are non-contractible.
This is proposed as a natural generalization of the paper's complexity-one torsion result to symplectic torus actions with non-isotropic orbits. The source presents it as a belief rather than a result, and gives no resolution, so its status remains open.
Sources & referencesView supporting material
Primary source
Rei Henigman and Yael Karshon, “Symplectic torus actions with non-contractible orbits”, arXiv:2607.21159 (2026).
Progress summary
Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.
Solutions 0
Sign in to submit a solution.
No solutions have been posted yet.