1 #ifndef STAN_MATH_REV_SCAL_FUN_LGAMMA_HPP 2 #define STAN_MATH_REV_SCAL_FUN_LGAMMA_HPP
void chain()
Apply the chain rule to this variable based on the variables on which it depends. ...
fvar< T > lgamma(const fvar< T > &x)
Return the natural logarithm of the gamma function applied to the specified argument.
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...
lgamma_vari(double value, vari *avi)
double val() const
Return the value of this variable.
fvar< T > digamma(const fvar< T > &x)
Return the derivative of the log gamma function at the specified argument.