Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Koszul property of the homogeneous coordinate ring of a curve   The following corollary has been added: for general tetragonal curve $C$ of
genus $g\ge 9$ the homogeneous coordinate ring of $C$ defined by the line
bundle $K(-T)$, where $K$ is the canonical class, $T$ is the tetragonal series,
is Koszul. Also some misprints are corrected.

15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph