fix typo

src/materialandmethods.tex

@@ -18,7 +18,7 @@
 \subsubsection{CNN}
 \subsubsection{Softmax}
 
-The Softmax function converts $n$ numbers in a vector into a probability distribution.
+The Softmax function converts $n$ numbers of a vector into a probability distribution.
 Its a generalization of the Sigmoid function and often used as an Activation Layer in neural networks.
 \begin{equation}\label{eq:softmax}
 \sigma(\mathbf{z})_j = \frac{e^{z_j}}{\sum_{k=1}^K e^{z_k}} \; for j\coloneqq\{1,\dots,K\}