Standard Character Condition for Table Algebras
2010
It is well known that the complex adjacency algebra $A$ of an association scheme has a specific module, namely the standard module , that contains the regular module of $A$ as a submodule. The character afforded by the standard module is called the standard character . In this paper we first define the concept of standard character for C-algebras and we say that a C-algebra has the standard character condition if it admits the standard character. Among other results we acquire a necessary and sufficient condition for a table algebra to originate from an association scheme. Finally, we prove that given a C-algebra admits the standard character and its all degrees are integers if and only if so its dual.
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