[Bug-gsl] Question about the Documentation

[Karl Edler]

Hello,

I believe that intrinsic to the algorithm in gsl_fcmp is that it is not
a reasonable thing to write something like gsl_fcmp(1e-16,0.0,1e-13) and
expect to receive a 0 indicating that 1e-16 is approximately 0.0.

(|u-v|<=|u|*e and |u-v|<=|v|*e )cannot be true if either u is 0.0 and e
and v are not.

I was hung up for a moment on this point and think that the gsl
documentation for gsl_fcmp should address this point so that novice gsl
programmers don't make the same mistake.

If I am still confused please correct me,
Karl Edler