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Weak metric scheme and Power moments identities for weak metric abelian scheme

초록/요약

Weak metric and weak cometric schemes were introduced as a generalization of metric and cometric schemes. They are given as the wreath product of a finite number of symmetric association schemes satisfying certain equivalent conditions which are analogous to the ones for metric or cometric schemes. It was known that power moments identities is obtained from a path matrix and a Vandermonde matrix determined by a given metric Abelian scheme. In this paper, we characterize those schemes and determine some of their parameters. Also, we determine a weak path matrix and a weak Vandermonde matrix from a weak metric Abelian scheme and then obtain a power moment identities by using them.

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