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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
core.hpp
stan::math::fvar::d_
T d_
Definition: fvar.hpp:15
stan
Definition: log_sum_exp.hpp:8
stan::math::fvar::val_
T val_
Definition: fvar.hpp:14
stan::math::tanh
fvar< T > tanh(const fvar< T > &x)
Definition: tanh.hpp:14
stan::math::tanh
var tanh(const var &a)
Return the hyperbolic tangent of the specified variable (cmath).
Definition: tanh.hpp:50
stan::math::fvar
Definition: fvar.hpp:13

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