Fix for using the old matrix_exponential of m1.
Onye: - test_korzhnev_2005_15n_sq_data
Is still failing. That still uses the matrix_exponential_rankN.
There seems to be a problem with matrix_exponential_rankN, when doing complex numbers.
Maybe the dtype has to get fixed? Use it as a input argument?
It must be the einsum
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-20
Parent: [r24200]
Child: [r24202]
