The function naming scheme directly copies the GSL manual except that
leading gsl_sf_ and, if present, the trailing _e is
stripped: thus gsl_sf_Airy_Ai_e goes to R function
airy_Ai(); however, some functions retain the prefix to avoid
conflicts (viz gsl_sf_sin(), gsl_sf_cos(),
gsl_sf_gamma(), gsl_sf_ choose(), gsl_sf_beta()).
R function arguments have the same names as in the GSL reference
manual, except for the quasirandom functions documented in the
Qrng manpage.
The package is organized into units corresponding to GSL header files;
the .c, .R, and .Rd filenames match the GSL header
filenames, except that the .Rd files are capitalized. Functions
appear in all files in the same order as the GSL reference manual, which
precludes the use of the tidying method given in section 3.1 of R-exts.
Error forms of GSL functions (_e versions) are used if available.
In general, documentation is limited to: (a), a pointer to the GSL reference book, which would in any case dominate any docs here; and (b), re-productions of some tables and figures in Abramowitz and Stegun (June 1964).