Corpus ID: 116510507

Nonvanishing of conformal blocks divisors on $\bar{M}_{0,n}$

@article{Belkale2014NonvanishingOC,
  title={Nonvanishing of conformal blocks divisors on \$\bar\{M\}\_\{0,n\}\$},
  author={P. Belkale and A. Gibney and S. Mukhopadhyay},
  journal={arXiv: Algebraic Geometry},
  year={2014}
}
We introduce and study the problem of finding necessary and sufficient conditions under which a conformal blocks divisor on $\bar{M}_{0,n}$ is nonzero. We give necessary conditions in type A, which are sufficient when theta and critical levels coincide. We show that divisors are subject to additive identities, dependent on ranks of the underlying bundle. These identities amplify vanishing and nonvanishing results and have other applications. 
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