Abstract
We present a deRham model for Chen-Ruan cohomology ring of abelian orbifolds. We introduce the notion of 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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B.C is supported by a grant of NSFC
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Chen, B., Hu, S. A deRham model for Chen-Ruan cohomology ring of Abelian orbifolds. Math. Ann. 336, 51–71 (2006). https://doi.org/10.1007/s00208-006-0774-3
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DOI: https://doi.org/10.1007/s00208-006-0774-3