Global minimization of a quadratic functional: neural network approach
  The problem of finding out the global minimum of a multiextremal functional is discussed. One frequently faces with such a functional in various applications. We propose a procedure, which depends on the dimensionality of the problem polynomially. In our approach we use the eigenvalues and eigenvectors of the connection matrix. 
L.B.Litinskii, B.M.Magomedov