Contribution in combinatorics in commutative algebra.(ph-d thesis)

Details Contribution in combinatorics in commutative algebra.(ph-d thesis) Contribution in combinatorics in commutative algebra.(ph-d thesis)

2007-08-28

arxiv.org/abs/0708.3752v1

Mathematics

Commutative Algebra

75 pages

Scientific paper

In the first chapter we present new results related on monomial ideals of Borel type. Also, we introduce a new class of monomial ideals, called $\de$-fixed ideals, which generalize the class of $p$-Borel ideals and we extend several results to this new class. In the second chapter, we compute the generic initial ideal, with repect to the reverse lexicographic order, of an ideal which define a complete intersection of embedding dimension three with strong Lefschetz property and we show that it is an almost reverse lexicographic ideal. This enable us to give a proof for Moreno's conjecture in the case $n=3$ and characteristic zero. Also, we prove that the $d$-component of the generic initial ideal, with respect to the reverse lexicographic order, of an ideal generated by a regular sequence of homogeneous polynomials of degree $d$ is revlex, in a particular, but important, case.

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