Real Function/Examples/Arbitrary Function

Example of Real Function
Let $f$ denote the real function defined as follows:
 * $\map f x = \begin {cases} 2 & : 0 \le x \le 1 \\ \sqrt x & : 2 \le x \le 3 \end {cases}$

Thus the domain of $f$ is seen to be:
 * $\Dom f = \closedint 0 1 \cup \closedint 2 3$


 * Tenenbaum-2B-Example-2-21.png