Cieliebak–Mohnke's monotone-extremal conjecture for projective space

Let ωFS\omega_{\mathrm{FS}} denote the Fubini–Study form on CPn\mathbb{CP}^n. For a closed Lagrangian torus L(X,ω)L\subset(X,\omega), call LL extremal when Amin(L)=CCM(X,ω)A_{\min}(L)=C^{\mathrm{CM}}(X,\omega). Cieliebak–Mohnke's monotone-extremal conjecture. A Lagrangian torus in (CPn,ωFS)(\mathbb{CP}^n,\omega_{\mathrm{FS}}) is monotone if and only if it is extremal. The source explains that this would make extremal Lagrangian tori a replacement for monotone tori, which only exist in monotone symplectic manifolds, and states that the paper does not prove it.

Sources & referencesView supporting material

Primary source

Shah Faisal and Yin Li, “Lagrangian capacity and chain level string topology”, arXiv:2606.20051 (2026).

Additional references

2 papers in this index state this conjecture (2025–2026). The statement above is taken from the most recent of them; the others are arXiv:2504.13076.

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