  This paper has two goals: to prove certain properties of character series of
graded algebras on which a finite group acts as algebra automorphisms and to
provide a detailed analysis of representations of 5-dimensional Sklyanin
algebras at points of order 2. We also prove that for any odd prime p, the
p-dimensional Sklyanin algebras associated to points of order 2 are graded
Clifford algebras.
