Real Function/Examples/Square Root

Example of Real Function

The (real) square root function is the real function $f: \R \to \R$ defined on the positive real numbers as:

$\forall x \in \R_{\ge 0}: \map f x = \sqrt x$

Also see

• Domain of Real Square Root Function
• Image of Real Square Root Function

Sources

• 1964: William K. Smith: Limits and Continuity ... (previous) ... (next): $\S 2.2$: Functions