diff --git a/math/lcm_sum.cpp b/math/lcm_sum.cpp
index d9c61fb95..60bac3283 100644
--- a/math/lcm_sum.cpp
+++ b/math/lcm_sum.cpp
@@ -1,6 +1,6 @@
 /**
  * @file
- * @brief An algorithm to calculate the sum of LCM: \f$\mathrm{LCM}(1,n) + \mathrm{LCM}(2,n) + .. + \mathrm{LCM}(n,n)\f$
+ * @brief An algorithm to calculate the sum of LCM: \f$\mathrm{LCM}(1,n) + \mathrm{LCM}(2,n) + \ldots + \mathrm{LCM}(n,n)\f$
  * @details An algorithm to calculate the sum of LCM: \f$\mathrm{LCM}(1,n) + \mathrm{LCM}(2,n) + .. + \mathrm{LCM}(n,n)\f$ where \f$\mathrm{LCM}(i,n)\f$
  * denotes the Least Common Multiple of the integers i and n. For n greater than or equal to 1.
  * The value of the sum is calculated by formula: