A Case Study in Bigraded Commutative Algebra
A Case Study in Bigraded Commutative Algebra
复制标题
二阶交换代数的案例研究
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
H. Schenck
中科院分区:
文献类型:
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作者:
D. Cox;A. Dickenstein;H. Schenck
We study the commutative algebra of three bihomogeneous polynomials p_0,p_1,p_2 of degree (2,1) in variables x,y;z,w, assuming that they never vanish simultaneously on P^1 x P^1. Unlike the situation for P^2, the Koszul complex of the p_i is never exact. The purpose of this article is to illustrate how bigraded commutative algebra differs from the classical graded case and to indicate some of the theoretical tools needed to understand the free resolution of the ideal generated by p_0,p_1,p_2.