fix typo

chapters/arrays.tex

@@ -1208,7 +1208,7 @@ \subsection{Multiplication of Matrices and Vectors}\label{matrix-and-vector-mult
 x * A = b; // same as transpose([x])*A*b
 [v] * transpose([v]) // outer product
 v * A * v // scalar
-tranpose([v]) * A * v // vector with one element
+transpose([v]) * A * v // vector with one element
 \end{lstlisting}
 \end{example}