inv_Phi.hpp

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#ifndef STAN_MATH_FWD_FUN_INV_PHI_HPP
#define STAN_MATH_FWD_FUN_INV_PHI_HPP
 
#include <stan/math/fwd/meta.hpp>
#include <stan/math/fwd/core.hpp>
#include <stan/math/prim/fun/constants.hpp>
#include <stan/math/prim/fun/inv_Phi.hpp>
#include <stan/math/prim/fun/square.hpp>
#include <cmath>
 
namespace stan {
namespace math {
 
template <typename T>
inline fvar<T> inv_Phi(const fvar<T>& p) {
  using std::exp;
  T xv = inv_Phi(p.val_);
  return fvar<T>(xv, p.d_ / exp(-0.5 * square(xv)) * SQRT_TWO_PI);
}
 
}  // namespace math
}  // namespace stan
#endif