TITLE:
Association Schemes with Multiple Q-polynomial Structures
ABSTARACT:
It is well known that an association scheme X = (X,{Ri}i = 0,...,d)
with k1 > 2 has at most two
P-polynomial structures. The parametrical condition for an association
scheme to have two P-polynomial structures is also known.
In this paper, we give a similar result for Q-polynomial association
schemes. In fact, if d>5, then we obtain exactly the same parametrical
conditions for the dual intersection numbers or Krein parameters.
Go Back to the List of Publications
Go Back to Suzuki's Home Page
Go Back to Suzuki's Home Page in Japanese