Johnson scheme
id:
johnson-scheme-240-727648
title:
Johnson scheme
text:
In mathematics, the Johnson scheme, named after Selmer M. Johnson, is also known as the triangular association scheme. It consists of the set of all binary vectors X of length ℓ and weight n, such that v = | X | = ( ℓ n ) . Two vectors x, y ∈ X are called ith associates if dist(x, y) = 2i for i = 0, 1, ..., n. The eigenvalues are given by where and Ek(x) is an Eberlein polynomial defined by
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https://en.wikipedia.org/wiki/Johnson_scheme
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date modified:
2023-08-11T17:23:16Z
main entity:
{"identifier":"Q6268497","url":"https://www.wikidata.org/entity/Q6268497"}
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