When is there a unique socle-vector associated to a given $h$-vector?

Details When is there a unique socle-vector associated to a given $h$-vector? When is there a unique socle-vector associated to a given $h$-vector?

2004-11-10

arxiv.org/abs/math/0411229v2

Comm. in Algebra 34 (2006), No. 5, 1847-1860.

Mathematics

Commutative Algebra

21 pages; to appear in Comm. in Algebra

Scientific paper

First, we construct a bijection between the set of $h$-vectors and the set of socle-vectors of artinian algebras. As a corollary, we find the minimum codimension that an artinian algebra with a given socle-vector can have. Then, we study the main problem in the paper: determining when there is a unique socle-vector for a given $h$-vector. We solve the problem completely if the codimension is at most 3.

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