Claim: The spectral theory of homogenous and isotropic random fields, which was developed by Myhailo Yadrenko, was used for the solution of the theory of Markov random fields and quantum field theory.
Evidence: He founded the theory of Markov random fields, which represented a new direction in the theory of random fields. Yadrenko developed the spectral theory of homogeneous and isotropic random fields in Euclidean, Hilbert, and Lobachevskii spaces. These results were used by Yadrenko and his disciples for the solution of important problems of linear prediction and filtration of random fields.