Abstract:
Let be the complexified Coxeter arrangement of hyperplanes of type A n −1 (n≥ 3). It is well known that the “minimal” projective De Concini–Procesi model of is isomorphic to the moduli space of stable n plus;1-pointed curves of genus 0. In this paper we study, from the point of view of models of arrangements, the action of the symmetric group Σ n on the integer cohomology ring of . In fact we find a formula for the generalized Poincaré series which encodes all the information about this representation of Σ n . This formula, which is obtained by using the elementary combinatorial properties of a ℤ-basis of and turns out to be very direct, should be compared with a more general result due to Getzler (see [5]).
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Received: 24 November 1997 / Revised version: 23 April 1998
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Gaiffi, G. Generalized Poincaré series for models¶of the braid arrangements. manuscripta math. 97, 353–369 (1998). https://doi.org/10.1007/s002290050108
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DOI: https://doi.org/10.1007/s002290050108