Alternative polarizations of Borel fixed ideals, Eliahou-Kervaire type resolution and discrete Morse theory

Details Alternative polarizations of Borel fixed ideals, Eliahou-Kervaire type resolution and discrete Morse theory Alternative polarizations of Borel fixed ideals, Eliahou-Kervaire type resolution and discrete Morse theory

2011-11-27

arxiv.org/abs/1111.6258v1

Mathematics

Commutative Algebra

24 pages

Scientific paper

We construct an Eliahou-Kervaire-like minimal free resolution of the alternative polarization $b-pol(I)$ of a Borel fixed ideal $I$. It yields new descriptions of the minimal free resolutions of $I$ itself and $I^sq$, where $(-)^sq$ is the squarefree operation in the shifting theory. These resolutions are cellular, and the (common) supporting cell complex is given by discrete Morse theory. If $I$ is generated in one degree, our description is equivalent to that of Nagel and Reiner.

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