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math.AG2001
Cohomology ring of crepant resolutions of orbifolds
Yongbin Ruan
Motivated by physics, we propose two conjectures regarding the cohomology ring of the crepant resolutions of orbifolds and cohomological invariants of K-equivalent manifolds.
math.AG2001
Orbifold Gromov-Witten Theory
Weimin Chen, Yongbin Ruan
In this article, we introduce the notion of good map and use it to establish Gromov-Witten theory for orbifolds.