trigamma() [1/6]

template<typename T >

fvar< T > stan::math::trigamma ( const fvar< T > &  u )

inline

Return the value of the trigamma function at the specified argument (i.e., the second derivative of the log Gamma function at the specified argument).

Template Parameters

T	inner type of the fvar

Parameters

u

argument

Returns

trigamma function at argument

Definition at line 25 of file trigamma.hpp.