Representation Theory of Finite Groups in Wiener--Hopf Factorization
  We consider the Wiener--Hopf factorization problem for a matrix function that is completely defined by its first column: the succeeding columns are obtained from the first one by means of a finite group of permutations. The symmetry of this matrix function allows us to reduce the dimension of the problem. In particular, we find some relations between its partial indices and can compute some of the indices. In special cases we can explicitly obtain the Wiener--Hopf factorization of the matrix function. 
Victor Adukov
math.CV