Re: [Gretl-devel] Digamma function: possible mistake
On Fri, 4 Nov 2016, Henrique Andrade wrote:
Dear Allin and Jack,
I think there is an error in the definition of the digamma function in
Gretl Command Reference.
Now we have:
<tex>
\psi(x) = d\Gamma(x)/dx
<\tex>
And I think it should be:
<tex>
\psi(x) = d\Gamma'(x)/dx
<\tex>
The ways I'm seeing it as written are
\psi(x) = d/dx ln \Gamma(x)
or
\psi(x) = \Gamma'(x) / \Gamma(x)
I've put the first of these into the TeX doc.
Allin