The cotangent-bundle Hofer–Zehnder capacity conjecture for non-aspherical manifolds

Let QQ be a closed oriented manifold that is not a K(π,1)K(\pi,1). The cotangent-bundle conjecture. Then

cHZ(DQ)<c_{HZ}^\circ(D^*Q)<\infty

and the almost existence property for closed contractible characteristics holds in DQD^*Q. The conjecture proposes that the method using symplectic homology with differential graded coefficients extends from the examples established in the paper to every closed oriented manifold that is not a K(π,1)K(\pi,1); its general validity remains open.

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Primary source

Jean-François Barraud, Mihai Damian, Vincent Humilière and Alexandru Oancea, “Floer Homology with DG Coefficients. Applications to cotangent bundles”, arXiv:2404.07953 (2026).

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