1 #ifndef STAN_MATH_REV_SCAL_FUN_ATAN_HPP 2 #define STAN_MATH_REV_SCAL_FUN_ATAN_HPP
The variable implementation base class.
void chain()
Apply the chain rule to this variable based on the variables on which it depends. ...
Independent (input) and dependent (output) variables for gradients.
fvar< T > atan(const fvar< T > &x)
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...