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A deRham model for Chen-Ruan cohomology ring of abelian orbifolds

Bohui Chen·Shengda Hu
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Abstract

We present a deRham model for Chen-Ruan cohomology ring of abelian orbifolds. We introduce the notion of \emph{twist factors} so that formally the stringy cohomology ring can be defined without going through pseudo-holomorphic orbifold curves. Thus our model can be viewed as the classical description of Chen-Ruan cohomology for abelian orbifolds. The model simplifies computation of Chen-Ruan cohomology ring. Using our model, we give a version of wall crossing formula.

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Bohui Chen, Shengda Hu. 2006-11-14. A deRham model for Chen-Ruan cohomology ring of abelian orbifolds. https://arxiv.org/abs/math/0408265

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