Taylor and Lyubeznik Resolutions via Grobner Bases

Details Taylor and Lyubeznik Resolutions via Grobner Bases Taylor and Lyubeznik Resolutions via Grobner Bases

2002-08-30

arxiv.org/abs/math/0208246v1

Mathematics

Commutative Algebra

14 pages, to appear in Journal of Symbolic Computation

Scientific paper

Taylor presented an explicit resolution for arbitrary monomial ideals. Later, Lyubeznik found that already a subcomplex defines a resolution. We show that the Taylor resolution may be obtained by repeated application of the Schreyer Theorem from the theory of Grobner bases, whereas the Lyubeznik resolution is a consequence of Buchberger's chain criterion. Finally, we relate Froberg's contracting homotopy for the Taylor complex to normal forms with respect to our Grobner bases and use it to derive a splitting homotopy that leads to the Lyubeznik complex.

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