[Bug libstdc++/33060] std::tr1::tgamma produces wrong results [for (x-1) in stead of for x]

Mon Aug 13 17:00:00 GMT 2007

------- Comment #2 from pcarlini at suse dot de  2007-08-13 17:00 -------
(In reply to comment #0)
> The implementation of std::tr1::tgamma looks wrong to me.
> 
> Keep in mind that the gamma function is equal to the factorial function for
> integer values.

Now I see: this statement is incorrect, and that's why we don't have an issue.
The real relationship is:

  gamma(m) == (m - 1)!

As you can check here, for example:

  http://en.wikipedia.org/wiki/Gamma_function
  http://mathworld.wolfram.com/GammaFunction.html

-- 

pcarlini at suse dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33060