1 #ifndef STAN_MATH_FWD_SCAL_FUN_DIGAMMA_HPP 2 #define STAN_MATH_FWD_SCAL_FUN_DIGAMMA_HPP
T d_
The tangent (derivative) of this variable.
T val_
The value of this variable.
fvar< T > trigamma(const fvar< T > &u)
Return the value of the trigamma function at the specified argument (i.e., the second derivative of t...
This template class represents scalars used in forward-mode automatic differentiation, which consist of values and directional derivatives of the specified template type.
fvar< T > digamma(const fvar< T > &x)
Return the derivative of the log gamma function at the specified argument.