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erfc.hpp
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#ifndef STAN_MATH_FWD_SCAL_FUN_ERFC_HPP
#define STAN_MATH_FWD_SCAL_FUN_ERFC_HPP
#include <math.h>
#include <stan/math/fwd/core.hpp>
#include <stan/math/prim/scal/fun/constants.hpp>
#include <stan/math/prim/scal/fun/square.hpp>
#include <cmath>
namespace stan {
namespace math {
template <typename T>
inline fvar<T> erfc(const fvar<T>& x) {
using ::erfc;
using std::sqrt;
using std::exp;
using stan::math::square;
return fvar<T>(erfc(x.val_), -x.d_ * exp(-square(x.val_))
* stan::math::TWO_OVER_SQRT_PI);
}
}
}
#endif
core.hpp
stan::math::fvar::d_
T d_
Definition: fvar.hpp:15
stan::math::sqrt
fvar< T > sqrt(const fvar< T > &x)
Definition: sqrt.hpp:15
stan::math::erfc
var erfc(const var &a)
The complementary error function for variables (C99).
Definition: erfc.hpp:63
square.hpp
stan::math::square
fvar< T > square(const fvar< T > &x)
Definition: square.hpp:15
stan::math::TWO_OVER_SQRT_PI
const double TWO_OVER_SQRT_PI
Definition: constants.hpp:161
stan::math::fvar::val_
T val_
Definition: fvar.hpp:14
stan::math::exp
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
constants.hpp
stan::math::erfc
fvar< T > erfc(const fvar< T > &x)
Definition: erfc.hpp:14
stan::math::fvar
Definition: fvar.hpp:13

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