Qin's u-part Floer cohomology conjecture for lifted Lagrangian branes

Let TT be a symplectic torus and let L,LL,L' be Lagrangian branes with lifts L,L\boldsymbol{L},\boldsymbol{L}' in the twisted doubling torus. Let HFu(L,L)HF_u^*(\boldsymbol{L},\boldsymbol{L}') denote the u-part Floer cohomology. For another Lagrangian brane LL” with lift L\boldsymbol{L}”, consider the usual and u-part Floer products.

Qin's u-part Floer cohomology conjecture. There is an isomorphism

HFu(L,L)HF(L,L),HF_u^*(\boldsymbol{L},\boldsymbol{L}')\cong HF^*(L,L'),

and the diagram comparing the products

HF(L,L)HF(L,L)HF(L,L)HF^*(L',L”)\otimes HF^*(L,L')\longrightarrow HF^*(L,L”)

and

HFu(L,L)HFu(L,L)HFu(L,L)HF_u^*(\boldsymbol{L}',\boldsymbol{L}”)\otimes HF_u^*(\boldsymbol{L},\boldsymbol{L}')\longrightarrow HF_u^*(\boldsymbol{L},\boldsymbol{L}”)

commutes.

This proposal aims to extend the comparison between Floer cohomology on the original torus and the u-part of Floer cohomology on its twisted doubling torus to nontransversal intersections. The source presents it as a conjectural general-case statement and gives no resolution status.

Sources & referencesView supporting material

Primary source

Yingdi Qin, “Coisotropic branes on tori and Homological mirror symmetry”, arXiv:2207.10647 (2022).

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