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falling_factorial.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_FUN_FALLING_FACTORIAL_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_FALLING_FACTORIAL_HPP
3
4 #include <stan/math/prim/scal/fun/log_falling_factorial.hpp>
5 #include <cmath>
6
7 namespace stan {
8 namespace math {
9
52 template<typename T1, typename T2>
53 inline typename boost::math::tools::promote_args<T1, T2>::type
54 falling_factorial(const T1 x, const T2 n) {
55 using std::exp;
56 return exp(log_falling_factorial(x, n));
57 }
58
59 }
60 }
61
62 #endif
stan::math::log_falling_factorial
fvar< T > log_falling_factorial(const fvar< T > &x, const fvar< T > &n)
Definition: log_falling_factorial.hpp:14
stan
Definition: log_sum_exp.hpp:8
stan::math::exp
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
stan::math::falling_factorial
fvar< T > falling_factorial(const fvar< T > &x, const fvar< T > &n)
Definition: falling_factorial.hpp:14
log_falling_factorial.hpp

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