[DMDB] Fix error

semester4/dmdb/parts/05_concurrency-control-recovery/02_transaction-model.tex

@@ -24,7 +24,7 @@ So, we have the following statements:
 Below a list of very important syntax for the exam (where the subscript $i$ denotes that this operation is part of transaction $T_i$):
 \begin{itemize}
     \item Read operations: $r_i[x]$ or $r_i(x)$ is an access to tuple $x$ without modifying it.
-    \item Write operations: $w_i[x]$ or $r_i(x)$ represents a write operation on the tuple $x$.
+    \item Write operations: $w_i[x]$ or $w_i(x)$ represents a write operation on the tuple $x$.
     \item Abort: $a_j$ is an abort of transaction $T_j$
     \item Commit $c_j$ is the commit of transaction $T_j$
 \end{itemize}