Resumo (PT):
Abstract (EN):
In this paper we formulate a generalization of the Krein
parameters of a symmetric association scheme which, in turn, allows us to
deduce some necessary conditions for the existence of these schemes. This
is achieved by applying some matrix analysis results over the elements
of the unique basis of minimal orthogonal idempotents of the underlying
algebra of a symmetric association scheme.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
8