Stan Math Library  2.14.0
reverse mode automatic differentiation
atanh.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_ATANH_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_ATANH_HPP
3 
4 #include <stan/math/fwd/core.hpp>
7 
8 namespace stan {
9  namespace math {
10 
20  template <typename T>
21  inline fvar<T> atanh(const fvar<T>& x) {
22  return fvar<T>(atanh(x.val_), x.d_ / (1 - square(x.val_)));
23  }
24 
25  }
26 }
27 #endif
fvar< T > atanh(const fvar< T > &x)
Return inverse hyperbolic tangent of specified value.
Definition: atanh.hpp:21
fvar< T > square(const fvar< T > &x)
Definition: square.hpp:14

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