Stan Math Library
2.8.0
reverse mode automatic differentiation
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stan
math
prim
scal
fun
log_rising_factorial.hpp
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#ifndef STAN_MATH_PRIM_SCAL_FUN_LOG_RISING_FACTORIAL_HPP
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#define STAN_MATH_PRIM_SCAL_FUN_LOG_RISING_FACTORIAL_HPP
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#include <boost/math/special_functions/gamma.hpp>
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namespace
stan {
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namespace
math {
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template
<
typename
T1,
typename
T2>
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inline
typename
boost::math::tools::promote_args<T1, T2>::type
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log_rising_factorial
(
const
T1 x,
const
T2 n) {
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using
boost::math::lgamma
;
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return
lgamma
(x + n) -
lgamma
(x);
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}
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}
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}
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#endif
stan::math::lgamma
fvar< T > lgamma(const fvar< T > &x)
Definition:
lgamma.hpp:15
stan::math::log_rising_factorial
fvar< T > log_rising_factorial(const fvar< T > &x, const fvar< T > &n)
Definition:
log_rising_factorial.hpp:16
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