Abstract
Under study is the relationship between the eigenfunctions of the Johnson and Hamming graphs. An eigenfunction of a graph is an eigenvector of its adjacency matrix with some eigenvalue; moreover, an eigenfunction can be identically zero. We find a criterion for the embeddability of an eigenfunction of the Johnson graph J(n, w) with a given eigenvalue into a certain eigenfunction of the Hamming graph with a given eigenvalue.
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