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Hanaki [A. Hanaki, Representations of association schemes and their factor schemes, Graphs Combin. 19 (2003) 195–201; A. Hanaki, Characters of association schemes and normal closed subsets, Graphs Combin. 19 (2003) 363–369] generalized many properties of characters of finite groups to characters of association schemes. In this paper we show that many of(More)
Let G be a finite abelian group acting faithfully on a finite set X. As a natural generalization of the perfect nonlinearity of Boolean functions, the G-bentness and G-perfect nonlinearity of functions on X are studied by Poinsot et al. [6, 7] via Fourier transforms of functions on G. In this paper we introduce the so-called G-dual set X of X, which plays(More)
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