[GiNaC-list] psi (digamma) solving

Matej Usaj m.usaj at utoronto.ca
Tue Mar 6 05:38:59 CET 2018

Hi All,

I'm trying to solve function that contains a call to psi (digamma) but
my call to fsolve fails every time, ie:

> f=psi(x/2)==0;
> fsolve(f,x,2.7,3.1);
fsolve(): function does not evaluate numerically

but I'd expect the result to be x~=2.923...

Am I missing something here?

Thanks for your help!

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