@@ -68,6 +68,7 @@ ___
- [Ladner's Theorem](https://en.wikipedia.org/wiki/NP-intermediate)
- [Levin Algorithm](https://en.wikipedia.org/wiki/P_versus_NP_problem#Polynomial-time_algorithms)
- [Nim](https://en.wikipedia.org/wiki/Nim)
+- [Log Sum Inequality](https://en.wikipedia.org/wiki/Log_sum_inequality)
