[Tex/LaTex] How to reduce spacing in equations

math-modespacing

I want to typeset short equations (variable = value) saving space.

Is there a global parameter which allows to reduce the space between operators and operands in math mode?

I found out, that there is a negative space \!which could be used, but I would have to type it in each single equation, which is inefficient.

\documentclass[11pt, a4paper]{scrbook}
\usepackage[ngerman]{babel}
\begin{document}
$a_0\!\!=\!\!12{,}459$

\end{document}

Best Answer

$a_0{=}12{,}459$

\thickmuskip=0.5\thickmuskip
$a_0=12{,}459$

\thickmuskip=0mu
$a_0=12{,}459$

from Typographer's view: it is not a good idea ...

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