The period-map local-homeomorphism conjecture for qq-quadratic differentials

Let logS\log {\mathbf{S}}_\bigtriangleup be a topological log surface with its hat homology group H^(logS)\widehat{\operatorname{\bf H}}_{}(\log {\mathbf{S}}_\bigtriangleup), and let QQuads(logS)\operatorname{QQuad}_s(\log {\mathbf{S}}_\bigtriangleup) be the moduli space of framed qsq_s-quadratic differentials with the prescribed numerical data. The period map

Πs ⁣:QQuads(logS)HomR(H^(logS),Cs)\Pi_s\colon\operatorname{QQuad}_s(\log {\mathbf{S}}_\bigtriangleup)\to \operatorname{Hom}_{R}(\widehat{\operatorname{\bf H}}_{}(\log {\mathbf{S}}_\bigtriangleup),\mathbb{C}_s)

assigns to a framed differential its period homomorphism. Period-map conjecture. The period map Πs\Pi_s is a local homeomorphism. This is the local-coordinate assertion underlying the period-map description of moduli of qq-quadratic differentials and their relation to qq-stability conditions. The supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

Akishi Ikeda and Yu Qiu, “q-Stability conditions via q-quadratic differentials for Calabi-Yau-X categories”, arXiv:1812.00010 (2022).

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