TY - JOUR

T1 - β nbc-bases for cohomology of local systems on hyperplane complements

AU - Falk, Michael

AU - Terao, Hiroaki

N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

PY - 1997

Y1 - 1997

N2 - We study cohomology with coefficients in a rank one local system on the complement of an arrangement of hyperplanes A. The cohomology plays an important role for the theory of generalized hypergeometric functions. We combine several known results to construct explicit bases of logarithmic forms for the only non-vanishing cohomology group, under some nonresonance conditions on the local system, for any arrangement A. The bases are determined by a linear ordering of the hyperplanes, and are indexed by certain "no-broken-circuits" bases of A. The basic forms depend on the local system, but any two bases constructed in this way are related by a matrix of integer constants which depend only on the linear orders and not on the local system. In certain special cases we show the existence of bases of monomial logarithmic forms.

AB - We study cohomology with coefficients in a rank one local system on the complement of an arrangement of hyperplanes A. The cohomology plays an important role for the theory of generalized hypergeometric functions. We combine several known results to construct explicit bases of logarithmic forms for the only non-vanishing cohomology group, under some nonresonance conditions on the local system, for any arrangement A. The bases are determined by a linear ordering of the hyperplanes, and are indexed by certain "no-broken-circuits" bases of A. The basic forms depend on the local system, but any two bases constructed in this way are related by a matrix of integer constants which depend only on the linear orders and not on the local system. In certain special cases we show the existence of bases of monomial logarithmic forms.

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U2 - 10.1090/s0002-9947-97-01844-8

DO - 10.1090/s0002-9947-97-01844-8

M3 - Article

AN - SCOPUS:0000634274

SN - 0002-9947

VL - 349

SP - 189

EP - 202

JO - Transactions of the American Mathematical Society

JF - Transactions of the American Mathematical Society

IS - 1

ER -