# [NTG-context] equivalent to \newcommand{...}{\ensuremath{...}}

Wolfgang Schuster schuster.wolfgang at gmail.com
Tue Dec 9 09:42:03 CET 2014

> Am 08.12.2014 um 17:41 schrieb j. van den hoff <veedeehjay at googlemail.com>:
>
> hi list,
>
> new to context' and my first question to the list: how can I achieve the following (latex') behaviour:
>
> \newcommand{\km}{\ensuremath{K_m}}
> We can now use \km\ in the body text as well as in this
>
>   \km = 1
>
> display equation.
>
> in context'? I've tried something like
>
> \def\km{\math{K_m}}
> We can now use \km\ in the body text but get sytnax errors when
> putting it in this
> \startformula
>   \km = 1
> \stopformula
> formula.
>
> but this fails for obvious reasons (as would using ' instead of ensuremath' in the latex' case).
>
> so what I need is a way of defining (potentially complex) math-expressions via some shortcuts/definitions/macros/abbreviations (whatever) which I can then use
> in the formula environment (or whatever it's called in context'...) as well as in the body text.
>
> any help appreciated,

In ConTeXt you have to write

\define\km{\mathematics{K_m}}

but there is not much to gain from this because you can enter math mode in the text with \m{…}.

Wolfgang
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