Symbols:R/Non-Zero Real Numbers

Real Numbers

$\R_{\ne 0}$

The set of non-zero real numbers:

$\R_{\ne 0} = \R \setminus \set 0$

The $\LaTeX$ code for \(\R_{\ne 0}\) is \R_{\ne 0}  or \mathbb R_{\ne 0} or \Bbb R_{\ne 0}.

MediaWiki $\LaTeX$ also allows \reals_{\ne 0}, but MathJax does not recognise that as a valid code.

Variants

$\R^*$

The set of non-zero real numbers:

$\R^* = \R \setminus \set 0$

The $\LaTeX$ code for \(\R^*\) is \R^*  or \mathbb R^* or \Bbb R^*.

MediaWiki $\LaTeX$ also allows \reals^*, but MathJax does not recognise that as a valid code.