1 #ifndef STAN_MATH_REV_SCAL_FUN_TGAMMA_HPP 2 #define STAN_MATH_REV_SCAL_FUN_TGAMMA_HPP void chain()
Apply the chain rule to this variable based on the variables on which it depends. ...
The variable implementation base class.
Independent (input) and dependent (output) variables for gradients.
const double val_
The value of this variable.
vari * vi_
Pointer to the implementation of this variable.
double adj_
The adjoint of this variable, which is the partial derivative of this variable with respect to the ro...
fvar< T > tgamma(const fvar< T > &x)
Return the result of applying the gamma function to the specified argument.
fvar< T > digamma(const fvar< T > &x)
Return the derivative of the log gamma function at the specified argument.