On Koszul property of the homogeneous coordinate ring of a curve
arXiv:alg-geom/9312004
Abstract
The following corollary has been added: for general tetragonal curve of genus the homogeneous coordinate ring of defined by the line bundle , where is the canonical class, is the tetragonal series, is Koszul. Also some misprints are corrected.
arXiv comment17 pages, Latex