Tonkonog's cap class as the first Maurer–Cartan component

In Tonkonog's setup, let BSSH0(X;k)\mathcal{BS}\in SH^0(X;\Bbbk) be the class obtained by counting holomorphic caps, and write β=β1+β2+\beta=\beta_1+\beta_2+\cdots for the filtration components of the Maurer–Cartan element. Cap-class conjecture.

BS=[β1].\mathcal{BS}=[\beta_1].

This identifies the leading Maurer–Cartan term with the cap-counting class whose closed–open image is the disc potential; the conjectural identification remains open in the generality stated.

Sources & referencesView supporting material

Primary source

Matthew Strom Borman, Nick Sheridan and Umut Varolgunes, “Quantum cohomology as a deformation of symplectic cohomology”, arXiv:2108.08391 (2022).

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