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multiply_log.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_FUN_MULTIPLY_LOG_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_MULTIPLY_LOG_HPP
3
4 #include <boost/math/tools/promotion.hpp>
5
6 namespace stan {
7 namespace math {
8
49 template <typename T_a, typename T_b>
50 inline typename boost::math::tools::promote_args<T_a, T_b>::type
51 multiply_log(const T_a a, const T_b b) {
52 using std::log;
53 if (b == 0.0 && a == 0.0)
54 return 0.0;
55 return a * log(b);
56 }
57
58 }
59 }
60
61 #endif
stan::math::log
fvar< T > log(const fvar< T > &x)
Definition: log.hpp:15
stan::math::multiply_log
fvar< T > multiply_log(const fvar< T > &x1, const fvar< T > &x2)
Definition: multiply_log.hpp:15

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