For example, the function(adsbygoogle = window.adsbygoogle || []).push({});

[tex]f\left( x \right) = \left\{ {\begin{array}{*{20}c}

{1:x > 0} \\

{0:x = 0} \\

{ - 1:x < 0} \\

\end{array} } \right.[/tex]

is known as the sign function, usually represented assgn x.

However, is there a specific name for the function

[tex]f\left( x \right) = \left\{ {\begin{array}{*{20}c}

{1:x > 0} \\

{ - 1:x \leqslant 0} \\

\end{array} } \right. [/tex]

?

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# Name of function

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