Cache: Lower bound for LRU referenced C_LRU instead of T_LRU

05-cache/cache.tex

@@ -370,7 +370,7 @@ $C-1$ cached blocks from the previous epoch. When it needs to access the remaini
 block, it replaces the one block, which is not going to be accessed in the current
 epoch. Thus it has only one cache miss per $C$~requests.
 
-Except for the first epoch, the ratio between $\Clru$ and~$\Copt$ is exactly~$C$.
+Except for the first epoch, the ratio between $\Tlru$ and~$\Topt$ is exactly~$C$.
 The first epoch can decrease this ratio, but its effect can be diminished
 by increasing~$K$.
 \qed