Fourier–Mukai wall-avoidance conjecture for rank-one Donaldson–Thomas classes

Let (β,n)Z2(\beta,n)\in\mathbb{Z}^2 satisfy

(1,0,β,n)=γ1+γ2,γiC,Θ(γ1)<Θ(γ2).(1,0,-\beta,-n)=\gamma_1+\gamma_2,\qquad \gamma_i\in\mathcal{C},\qquad \Theta(\gamma_1)<\Theta(\gamma_2).

Assume β0\beta\neq 0 or n>0n>0. Fourier–Mukai wall-avoidance conjecture. For every integer solution (c,d)(c,d) of

d33βc2dnc3=1,d^3-3\beta c^2d-nc^3=1,

one has

dc(Θ(γ1),Θ(γ2)).-\frac{d}{c}\notin(\Theta(\gamma_1),\Theta(\gamma_2)).

This is a constraint on possible Fourier–Mukai transforms and destabilizing decompositions in the study of Donaldson–Thomas invariants; the source presents it as a question/conjectural assertion and supplies no resolution in the excerpt.

Sources & referencesView supporting material

Primary source

Georg Oberdieck, Dulip Piyaratne and Yukinobu Toda, “Donaldson-Thomas invariants of abelian threefolds and Bridgeland stability conditions”, arXiv:1808.02735 (2020).

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