Kernel of locally nilpotent $R$-derivations of $R[X,Y]$
Kernel of locally nilpotent $R$-derivations of $R[X,Y]$
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$R[X,Y]$ 的局部幂零 $R$ 导数的内核
DOI:
10.1090/s0002-9947-97-01946-6
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发表时间:
1997
影响因子:
1.3
通讯作者:
A. K. Dutta
中科院分区:
文献类型:
--
作者:
S. M. Bhatwadekar;A. K. Dutta
In this paper we study the kernel of a non-zero locally nilpotent R-derivation of the polynomial ring R[ X, Y ] over a noetherian integral domain R containing a field of characteristic zero. We show that if R is normal then the kernel has a graded R-algebra structure isomorphic to the symbolic Rees algebra of an unmixed ideal of height one in R, and, conversely, the symbolic Rees algebra of any unmixed height one ideal in R can be embedded in R[ X, Y ] as the kernel of a locally nilpotent R-derivation of R[ X, Y ]. We also give a necessary and sufficient criterion for the kernel to be a polynomial ring in general.