> Am 09.12.2014 um 09:59 schrieb j. van den hoff : > > On Tue, 09 Dec 2014 09:42:03 +0100, Wolfgang Schuster > wrote: > >> >>> Am 08.12.2014 um 17:41 schrieb j. van den hoff : >>> >>> 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, >> >> 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{…}. > > thanks for the response. in my silly example you are right (but even there it saves more than 50% of keystrokes). but I'm thinking of course of more tedious math expressions where it rapidly is handy to use such abbreviations -- the more so, if you have, say, 20 different ones appearing repeatedly in the document. but that would work with the `\def..\math' construct in the body text. what does _not_ work, then, is to use the definition in a display (\startformula...\stopformula) equation (which it _does_ in latex when isolating the math expression with `ensuremath'). so my real question(s) are: > > 1. is there any way to achieve the same functionality in `context' (expansion of math-containing defintion/macro/abbreviation in text _and_ math environment? if yes, how would I do this? > > 2. if no, would it be sensible (and feasible) to modify `\math' behaviour and to make it aware of whether it is called from within text or from within a display equation (in which case it should do nothing...), i.e. mkae it behave like `\ensuremath' in latex? 1 + 2: \define\Foo{\mathematics{f(x)}} \define\Bar{\mathortext {f(x)}{\m{g(x)}}} \starttext a \Foo\ \Bar\ b \startformula \Foo\ \Bar \stopformula \stoptext Wolfgang