Source: wikibot/trigamma-function
= Trigamma function
{wiki=Trigamma_function}
The trigamma function, denoted as \\(\\psi' (x)\\) or sometimes as \\(\\mathrm\{Trigamma\}(x)\\), is the derivative of the digamma function \\(\\psi(x)\\), which is itself the logarithmic derivative of the gamma function \\(\\Gamma(x)\\).