# Signum Function

The signum function

**S**is defined as follows

**S**(x) =

The domain of

**S**is

**R**and its range is {-1, 0, 1}. Note that for x â‰ 0

The graph of the signum function is given in the figure:

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The signum function

The domain of

The graph of the signum function is given in the figure:

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