The cuplength lower bound for Rouquier dimension of wrapped Fukaya categories

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Let MM be a smooth manifold, and let Cuplength⁡(M)\operatorname{Cuplength}(M) denote the cuplength of H∗(M;k)H^*(M;k) for any field kk. Let C(M)\mathcal C(M) denote the wrapped Fukaya category associated to MM. Cuplength conjecture.

Cuplength⁡(M)≤Rdim⁡(C(M)).\operatorname{Cuplength}(M)\leq \operatorname{Rdim}(\mathcal C(M)).

This conjecture proposes that cuplength gives a lower bound for Rouquier dimension, strengthening the paper's lower bound for generation by the cotangent fiber. The source gives no resolution.

References

Primary source

Andrew Hanlon, Jeff Hicks and Oleg Lazarev, “Relating categorical dimensions in topology and symplectic geometry”, arXiv:2308.13677 (2025).

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