Functional Notation for Operators

All of the basic signal processing blocks in §2.1 can be written also in functional notation:

$$\begin{tabular}{rcl} \texttt{+(x)} & $\to$\ & \texttt{\_,x : +} \\ \texttt{/(x)} & $\to$\ & \texttt{\_,x : /} \\ \texttt{-(x)} & $\to$\ & \texttt{\_,x : -} \\ \texttt{\^{}(x)} & $\to$\ & \texttt{\_,x : pow} \\ \end{tabular}$$

and so on.