Stan Math Library  2.10.0
reverse mode automatic differentiation
tanh.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_TANH_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_TANH_HPP
3 
4 #include <stan/math/fwd/core.hpp>
5 
6 
7 namespace stan {
8 
9  namespace math {
10 
11  template <typename T>
12  inline
13  fvar<T>
14  tanh(const fvar<T>& x) {
15  using std::tanh;
16  T u = tanh(x.val_);
17  return fvar<T>(u, x.d_ * (1 - u * u));
18  }
19  }
20 }
21 #endif
fvar< T > tanh(const fvar< T > &x)
Definition: tanh.hpp:14
var tanh(const var &a)
Return the hyperbolic tangent of the specified variable (cmath).
Definition: tanh.hpp:50

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