Green–Lazarsfeld gonality conjecture

Let CC be a curve of gonality dd, and let LL be a nonspecial very ample line bundle on CC. Writing h0(L)h^0(L) for the dimension of its space of global sections, Green–Lazarsfeld's gonality conjecture. There exists such an LL for which

Kh0(L)d,1(C,L)=0.K_{h^0(L)-d,1}(C,L)=0.

This predicts optimal syzygy vanishing for a sufficiently positive embedding of a curve, with the gonality determining the last nonvanishing linear syzygy. The source presents it as a conjecture for bundles of large degree.

Sources & referencesView supporting material

Primary source

Marian Aprodu and Gavril Farkas, “Green's conjecture for general covers”, arXiv:1105.3933 (2023).

Additional references

4 papers in this index state this conjecture (2003–2011). The statement above is taken from the most recent of them; the others are arXiv:0811.3117, arXiv:math/0609107, arXiv:math/0301261.

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