Stability over cDV singularities and other complete local rings

We characterise subcategories of semistable modules for noncom-
mutative minimal models of compound Du Val singularities, including
the non-isolated case. We find that the stability is controlled by an
infinite polyhedral fan that stems from silting theory, and which can
be computed from the Dynkin diagram combinatorics of the minimal
models found in the work of Iyama–Wemyss. In the isolated case, we
moreover find an explicit description of the deformation theory of the
stable modules in terms of factors of the endomorphism algebras of
2-term tilting complexes. To obtain these results we generalise a corre-
spondence between 2-term silting theory and stability, which is known
to hold for finite dimensional algebras, to the much broader setting of
algebras over a complete local Noetherian base ring.