diff --git a/math/double_factorial.cpp b/math/double_factorial.cpp index 1d1f7dae4..a400ae147 100644 --- a/math/double_factorial.cpp +++ b/math/double_factorial.cpp @@ -1,8 +1,9 @@ /** * @file - * @brief Compute double factorial: \f$n!!\f$ + * @brief Compute [double + * factorial](https://en.wikipedia.org/wiki/Double_factorial): \f$n!!\f$ * - * Double factorial of a non-negative integer n, is defined as the product of + * Double factorial of a non-negative integer `n`, is defined as the product of * all the integers from 1 to n that have the same parity (odd or even) as n. *
It is also called as semifactorial of a number and is denoted by * \f$n!!\f$