1#ifndef STAN_MATH_FWD_FUN_ERFCX_HPP
2#define STAN_MATH_FWD_FUN_ERFCX_HPP
T erfcx_derivative(const T &x, const T &value)
Derivative of erfcx, 2 * x * erfcx(x) - 2 / sqrt(pi).
fvar< T > erfcx(const fvar< T > &x)
Return the scaled complementary error function of the argument.
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...
Scalar val_
The value of this variable.
Scalar d_
The tangent (derivative) of this variable.
This template class represents scalars used in forward-mode automatic differentiation,...