The Kuznetsov decomposition conjecture for Fano complete intersections

Let XPnX\subset\mathbf{P}^n be a smooth Fano complete intersection of degree dnd\leq n. Its Kuznetsov decomposition is

Dcohb(X)=Ku(X),OX,,OX(nd),\operatorname{D^b_{coh}}(X)=\left\langle\mathrm{Ku}(X),\langle\mathcal{O}_X,\ldots,\mathcal{O}_X(n-d)\rangle\right\rangle,

where Ku(X):=OX,,OX(nd)\mathrm{Ku}(X):=\langle\mathcal{O}_X,\ldots,\mathcal{O}_X(n-d)\rangle^\perp is the Kuznetsov, or residual, component. A refinement and mutation of this decomposition means that the proposed decomposition is obtained by refining components and applying semiorthogonal mutations.

The Kuznetsov decomposition conjecture. For a Fano complete intersection XPnX\subset\mathbf{P}^n, there exist τH(X)\tau\in\mathrm{H}^\bullet(X) and a sector S\mathscr{S} such that the preceding path-and-decomposition conjecture holds and the induced semiorthogonal decomposition is a refinement and mutation of the Kuznetsov decomposition.

This conjecture predicts that the noncommutative minimal model construction recovers the standard semiorthogonal decompositions known for Fano complete intersections, up to refinement and mutation. The existence of the required path and the claimed relationship remain open.

Sources & referencesView supporting material

Primary source

Tomohiro Karube, Antonios-Alexandros Robotis and Vanja Zuliani, “Toward the noncommutative minimal model program for Fano varieties”, arXiv:2601.20739 (2026).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.