1 #ifndef STAN_MATH_REV_CORE_OPERATOR_MULTIPLICATION_HPP
2 #define STAN_MATH_REV_CORE_OPERATOR_MULTIPLICATION_HPP
7 #include <boost/math/special_functions/fpclassify.hpp>
14 class multiply_vv_vari :
public op_vv_vari {
16 multiply_vv_vari(vari* avi, vari* bvi) :
17 op_vv_vari(avi->val_ * bvi->val_, avi, bvi) {
22 avi_->adj_ = std::numeric_limits<double>::quiet_NaN();
23 bvi_->adj_ = std::numeric_limits<double>::quiet_NaN();
25 avi_->adj_ += bvi_->val_ * adj_;
26 bvi_->adj_ += avi_->val_ * adj_;
31 class multiply_vd_vari :
public op_vd_vari {
33 multiply_vd_vari(vari* avi,
double b) :
34 op_vd_vari(avi->val_ * b, avi, b) {
39 avi_->adj_ = std::numeric_limits<double>::quiet_NaN();
41 avi_->adj_ += adj_ * bd_;
84 return var(
new multiply_vv_vari(a.
vi_, b.
vi_));
101 return var(
new multiply_vd_vari(a.
vi_, b));
118 return var(
new multiply_vd_vari(b.
vi_, a));
Independent (input) and dependent (output) variables for gradients.
bool isnan(const stan::math::var &v)
Checks if the given number is NaN.
vari * vi_
Pointer to the implementation of this variable.
fvar< T > operator*(const fvar< T > &x1, const fvar< T > &x2)