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[<or_pong@hotmail.com>]

    In order to test my comprehension, eigen value problem of dynamical matrix
(from ABINIT output) had been solved using both Octave and Mathcad 14. My
octave command had been shown.
    [U,e]= eig(Dyn); 
    eival = sqrt(e);
Where Dyn is dynamical matrix.

Octave eigen values  of silicon crystal at q = 0 0 0 are 
    0, 0, 0, 0.282, 0.282, 0.282.

 Phonon energies in Hartree :
   0.000000E+00  0.000000E+00  0.000000E+00  2.345206E-03  2.345206E-03
2.35E-03

    Octave results had been compared with Phonon energies in Hartree (same
ABINIT output) value by value. From the comparisions, I can write a relation
between any couple.
    eival_octave / phonon energy = 226.26

Please give me any suggestion about unit of Octave results.

Thank you very much,