equivalent to \newcommand{...}{\ensuremath{...}}

["j. van den hoff" <veedeehjay@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
\begin{equation}
    \km = 1
\end{equation}
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,

joerg
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