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arxiv: math/0209196 · v1 · submitted 2002-09-16 · 🧮 math.AC

Local cohomology modules with infinite dimensional socles

classification 🧮 math.AC
keywords ringdimensionalinfinitelocalpolynomialcoefficientscohomologycommutative
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Let T be a commutative Noetherian local ring of dimension at least two and R=T[x_1,...,x_n] a polynomial ring in n variables over T. Consider R as a graded ring with deg T = 0 and deg x_i = 1 for all i. Let I=R_+ and f a homogeneous polynomial whose coefficients form a system of parameters for T. We show that the socle of H^n_I(R/fR) is infinite dimensional, generalizing an example due to Hartshorne.

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