Ottaviani–Paoletti conjecture for syzygies of Veronese embeddings

Let kk be a field of characteristic 00, let VV be a finite-dimensional kk-vector space, and let Kp,qd(V,b)K_{p,q}^d(V,b) denote the Koszul cohomology group associated with the dd-th Veronese embedding, as defined by the three-term complex in the source. The group Kp,qd(V,0)K_{p,q}^d(V,0) measures minimal pp-th syzygies of degree p+qp+q of the Veronese coordinate ring.

Ottaviani–Paoletti conjecture.

Kp,qd(V,0)=0K_{p,q}^d(V,0)=0

for q2q\geq 2 and p3d3p\leq 3d-3.

This is equivalent to the assertion that the dd-th Veronese embedding satisfies the corresponding linear-syzygy property through this range. The conjecture is known for d=2d=2 and when dimV=2\dim V=2 or 33; the remaining cases were open in the source. Ottaviani and Paoletti showed that the bound is sharp by proving Kp,2d(V,0)0K_{p,2}^d(V,0)\neq 0 for p=3d2p=3d-2 when dimV3\dim V\geq 3 and d3d\geq 3.

Sources & referencesView supporting material

Primary source

Thanh Vu, “N_6 property for third Veronese embeddings”, arXiv:1303.5532 (2013).

Additional references

2 papers in this index state this conjecture (2003–2013). The statement above is taken from the most recent of them; the others are arXiv:math/0309102.

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