Hyperplane arrangement cohomology and monomials in the exterior algebra

Eisenbud, David; Popescu, Sorin; Yuzvinsky, Sergey

doi:10.1090/S0002-9947-03-03292-6

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ISSN 1088-6850(online) ISSN 0002-9947(print)

Hyperplane arrangement cohomology and monomials in the exterior algebra

Authors: David Eisenbud, Sorin Popescu and Sergey Yuzvinsky
Journal: Trans. Amer. Math. Soc. 355 (2003), 4365-4383
MSC (2000): Primary 15A75, 52C35, 55N45; Secondary 55N99, 14Q99
Posted: July 10, 2003
MathSciNet review: 1986506
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Abstract: We show that if is the complement of a complex hyperplane arrangement, then the homology of has linear free resolution as a module over the exterior algebra on the first cohomology of . We study invariants of that can be deduced from this resolution. A key ingredient is a result of Aramova, Avramov, and Herzog (2000) on resolutions of monomial ideals in the exterior algebra. We give a new conceptual proof of this result.

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