The representation theory of seam algebras
2020
The boundary seam algebras \mathsf{b}_{n,k}(\beta=q+q^{-1}) 𝖻 n , k ( β = q + q − 1 )
were introduced by Morin-Duchesne, Ridout and Rasmussen to formulate
algebraically a large class of boundary conditions for two-dimensional
statistical loop models. The representation theory of these algebras
\mathsf{b}_{n,k}(\beta=q+q^{-1}) 𝖻 n , k ( β = q + q − 1 )
is given: their irreducible, standard (cellular) and principal modules
are constructed and their structure explicited in terms of their
composition factors and of non-split short exact sequences. The
dimensions of the irreducible modules and of the radicals of standard
ones are also given. The methods proposed here might be applicable to a
large family of algebras, for example to those introduced recently by
Flores and Peltola, and Crampe and Poulain d’Andecy.
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