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reverse mode automatic differentiation
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operator_multiplication.hpp
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1 #ifndef STAN_MATH_FWD_CORE_OPERATOR_MULTIPLICATION_HPP
2 #define STAN_MATH_FWD_CORE_OPERATOR_MULTIPLICATION_HPP
3 
5 
6 
7 namespace stan {
8 
9  namespace math {
10 
11  template <typename T>
12  inline
13  fvar<T>
14  operator*(const fvar<T>& x1, const fvar<T>& x2) {
15  return fvar<T>(x1.val_ * x2.val_,
16  x1.d_ * x2.val_ + x1.val_ * x2.d_);
17  }
18 
19  template <typename T>
20  inline
21  fvar<T>
22  operator*(double x1, const fvar<T>& x2) {
23  return fvar<T>(x1 * x2.val_, x1 * x2.d_);
24  }
25 
26  template <typename T>
27  inline
28  fvar<T>
29  operator*(const fvar<T>& x1, double x2) {
30  return fvar<T>(x1.val_ * x2, x1.d_ * x2);
31  }
32  }
33 }
34 #endif
fvar< T > operator*(const fvar< T > &x1, const fvar< T > &x2)

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