Yorck Sommerhauser – författare

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2 produkter

1. 

   Yetter-Drinfel'd Hopf Algebras over Groups of Prime Order

   Av Yorck Sommerhauser

   E-bok, 2004

   348 kr

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   Being the first monograph devoted to this subject, the book addresses the classification problem for semisimple Hopf algebras, a field that has attracted considerable attention in the last years. The special approach to this problem taken here is via semidirect product decompositions into …

2. 

   Hochschild Cohomology, Modular Tensor Categories, and Mapping Class Groups I

   Av Yorck Sommerhauser, Christoph Schweigert m. fl.

   E-bok, 2023

   734 kr

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   The book addresses a key question in topological field theory and logarithmic conformal field theory: In the case where the underlying modular category is not semisimple, topological field theory appears to suggest that mapping class groups do not only act on the spaces of chiral conformal blocks, …