Filter-regular sequences, almost complete intersections and Stanley's conjecture

Details Filter-regular sequences, almost complete intersections and Stanley's conjecture Filter-regular sequences, almost complete intersections and Stanley's conjecture

2011-12-21

arxiv.org/abs/1112.5159v1

Mathematics

Commutative Algebra

Scientific paper

Let $K$ be a field and $I$ a monomial ideal of the polynomial ring $S=K[x_1,..., x_n]$ generated by monomials $u_1,u_2,..., u_t$. We show that $S/I$ is pretty clean if either: 1) $u_1,u_2,..., u_t$ is a filter-regular sequence, 2) $u_1,u_2,..., u_t$ is a $d$-sequence; or 3) $I$ is almost complete intersection. In particular, in each of these cases, $S/I$ is sequentially Cohen-Macaulay and both Stanley's and $h$-regularity conjectures, on Stanley decompositions, hold for $S/I$. Also, we prove that if $I$ is the Stanley-Reisner ideal of a locally complete intersection simplicial complex on $[n]$, then Stanley's conjecture holds for $S/I$.

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