Pseudo-triple-sum-sets and association schemes
We introduce and characterize pseudo-triple-sum-sets as a natural extension of triple-sum-sets. We Show that if Ω is the set of coordinate forms of a linear projective code C(n,k) over F=GF(q) and if \(\widehat\Omega\)=F. Ω is a pseudo-triple-sum-set then C can be considered as a three classes association subscheme of the Hamming scheme H(n,q).
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