COMPUTATION OF THE INDEPENDENT ELEMENTS OF THE DYNAMICAL MATRIX

In this paper we present a program which reduces the independent eleme nts of the dynamical matrix with group theory to its theoretical minim um exactly, i.e, without the use of random numbers and incorporating t he linear relations between the elements of the dynamical matrix which may arise in trigonal and hexagonal space groups, As input only the s pace group symbol, the atom positions of the asymmetrical unit of the unit cell and the coordinates of the vector k in the Brillouin zone ar e needed.