Stan Math Library  2.12.0
reverse mode automatic differentiation
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 namespace stan {
7  namespace math {
8 
9  template <typename T>
10  inline
11  fvar<T>
12  operator*(const fvar<T>& x1, const fvar<T>& x2) {
13  return fvar<T>(x1.val_ * x2.val_,
14  x1.d_ * x2.val_ + x1.val_ * x2.d_);
15  }
16 
17  template <typename T>
18  inline
19  fvar<T>
20  operator*(double x1, const fvar<T>& x2) {
21  return fvar<T>(x1 * x2.val_, x1 * x2.d_);
22  }
23 
24  template <typename T>
25  inline
26  fvar<T>
27  operator*(const fvar<T>& x1, double x2) {
28  return fvar<T>(x1.val_ * x2, x1.d_ * x2);
29  }
30  }
31 }
32 #endif
fvar< T > operator*(const fvar< T > &x1, const fvar< T > &x2)

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