Stan Math Library  2.15.0
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 namespace stan {
7  namespace math {
8 
9  template <typename T>
10  inline
11  fvar<T>
12  tanh(const fvar<T>& x) {
13  using std::tanh;
14  T u = tanh(x.val_);
15  return fvar<T>(u, x.d_ * (1 - u * u));
16  }
17  }
18 }
19 #endif
fvar< T > tanh(const fvar< T > &x)
Definition: tanh.hpp:12
var tanh(const var &a)
Return the hyperbolic tangent of the specified variable (cmath).
Definition: tanh.hpp:50

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