matrix inversion

[Brian Gough]

Rooms Frédéric writes:
 > 
 > is there an easy way to inverse complex matrix ?
 > 

There wasn't but I've added a new complex LU decomposition to the CVS
repository, gsl_linalg_complex_LU_decomp(), since it is the same as
the the real case.  We need someone to write the other complex matrix
decompositions though -- they are more difficult.

There are some additional functions for solving a linear system
gsl_linalg_complex_LU_solve() and calculating the inverse
gsl_linalg_complex_LU_invert()in the same file (linalg/luc.c).

As mentioned there might be a safer alternative to the direct
calculation of the inverse, depending what you want to do with it.

regards
Brian Gough