Big indecomposable modules and direct-sum relations
Hassler, Wolfgang ; Karr, Ryan ; Klingler, Lee ; Wiegand, Roger
Illinois J. Math., Tome 51 (2007) no. 3, p. 99-122 / Harvested from Project Euclid
A commutative Noetherian local ring $(R,\m)$ is said to be \emph{Dedekind-like} provided $R$ has Krull-dimension one, $R$ has no non-zero nilpotent elements, the integral closure $\overline R$ of $R$ is generated by two elements as an $R$-module, and $\m$ is the Jacobson radical of $\overline R$. A classification theorem due to Klingler and Levy implies that if $M$ is a finitely generated indecomposable module over a Dedekind-like ring, then, for each minimal prime ideal $P$ of $R$, the vector space $M_P$ has dimension $0, 1$ or $2$ over the field $R_P$. The main theorem in the present paper states that if $R$ (commutative, Noetherian and local) has non-zero Krull dimension and is not a homomorphic image of a Dedekind-like ring, then there are indecomposable modules that are free of any prescribed rank at each minimal prime ideal.
Publié le : 2007-01-15
Classification:  13C13,  13D07,  13F05
@article{1258735327,
     author = {Hassler, Wolfgang and Karr, Ryan and Klingler, Lee and Wiegand, Roger},
     title = {Big indecomposable modules and direct-sum relations},
     journal = {Illinois J. Math.},
     volume = {51},
     number = {3},
     year = {2007},
     pages = { 99-122},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1258735327}
}
Hassler, Wolfgang; Karr, Ryan; Klingler, Lee; Wiegand, Roger. Big indecomposable modules and direct-sum relations. Illinois J. Math., Tome 51 (2007) no. 3, pp.  99-122. http://gdmltest.u-ga.fr/item/1258735327/