C= 2 rational toroidal conformal field theories via the Gauss product

Shinobu Hosono Bong H Lian Keiji Oguiso Shing-Tung Yau

Mathematical Physics mathscidoc:1912.43595

Communications in mathematical physics, 241, 245-286, 2003.10
We find a concise relation between the moduli , of a rational Narain lattice (,) and the corresponding momentum lattices of left and right chiral algebras via the Gauss product. As a byproduct, we find an identity which counts the cardinality of a certain double coset space defined for isometries between the discriminant forms of rank two lattices.
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@inproceedings{shinobu2003c=,
  title={c= 2 rational toroidal conformal field theories via the Gauss product},
  author={Shinobu Hosono, Bong H Lian, Keiji Oguiso, and Shing-Tung Yau},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204320935562159},
  booktitle={Communications in mathematical physics},
  volume={241},
  pages={245-286},
  year={2003},
}
Shinobu Hosono, Bong H Lian, Keiji Oguiso, and Shing-Tung Yau. c= 2 rational toroidal conformal field theories via the Gauss product. 2003. Vol. 241. In Communications in mathematical physics. pp.245-286. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204320935562159.
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