Hi! The part of gsl-2.5 documentation that describes the functions related to permutations says "The functions described in this chapter are defined in the header file gsl_permutation.h"
However, I got a warning: implicit declaration of function ‘gsl_permute_matrix’, thus, I looked into the header files in /include/gsl and found out that gsl_permutation.h didn't include gsl_permute_matrix.h. This probably is not a bug as I added gsl_permute_matrix.h and compiled my program. However, it wasn't mentioned in the online documentation. Kind regards, Brijesh