The conjecture on moduli spaces of semiorthogonal decompositions for families of dg categories
Let be a family of smooth and proper dg categories over an excellent scheme . For a quasicompact and semiseparated scheme with a morphism , write for the base change of the family and let a -linear semiorthogonal decomposition be a decomposition of into admissible -linear subcategories.
Moduli-space conjecture. There exists an étale algebraic space over with a functorial bijection
for every such .
This predicts that semiorthogonal decompositions in smooth and proper dg-category families form an étale algebraic moduli space, extending the previously constructed moduli space for families arising from schemes. The conjecture is presented as a generalization suggested by the algebraicity results established earlier in the paper; its resolution is not specified in the supplied text.
References
Primary source
Pieter Belmans, Shinnosuke Okawa and Andrea T. Ricolfi, “Moduli spaces of semiorthogonal decompositions in families”, arXiv:2002.03303 (2025).
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