[Help-gsl] GSL functions

[Shell]

Hi,

I am writing up a report in which i have used gsl functions, and need to 
include the definitions of what the particular GSL functions are used for. I 
was woondering if you could help me with this as i am having trouble finding 
the definitions. The GSL functions I have used are:

gsl/gsl_vector.h
gsl/gsl_matrix.h
gsl/gsl_blas.h 
gsl/gsl_multifit_nlin.h

Thankyou,

Michelle