Exotic monotone torus conjecture for CP1×CP1\mathbb{CP}^1\times\mathbb{CP}^1

Let Tr,0cT^c_{r,0} be a Lagrangian torus in CP1×CP1\mathbb{CP}^1\times\mathbb{CP}^1 of type T(1,2,9)T(1,2,9), and let a family of Maslov-index-22 holomorphic discs mean a family of such discs with boundary on the torus. A monotone Lagrangian torus is one for which the symplectic area is proportional to the Maslov index on relative homotopy classes. Exotic monotone torus conjecture. There is a monotone T(1,2,9)T(1,2,9) torus, of the form Tr,0cT^c_{r,0}, in CP1×CP1\mathbb{CP}^1\times\mathbb{CP}^1, bounding 99 families of Maslov-index-22 holomorphic discs, that is not symplectomorphic to the monotone Chekanov torus nor to the monotone Clifford torus. This predicts an exotic monotone Lagrangian torus in CP1×CP1\mathbb{CP}^1\times\mathbb{CP}^1 distinct from the known Clifford and Chekanov examples; the supplied text gives no resolution status.

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Primary source

Renato Vianna, “On Exotic Lagrangian Tori in CP^2”, arXiv:1305.7512 (2014).

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