Re: \everymath problem

[Wolfgang Schuster <schuster.wolfgang@googlemail.com>]

Am 19.08.2009 um 16:47 schrieb Hans Hagen:

> Eythan Weg wrote:
>> Hi,
>> I use luatex 0.43 with yesterday's beta.  Running    \everymath =  
>> {\displaystyle}
>>    \starttext
>>  ${a\over  b}$
>>    \stoptext
>> results in   ! Use of \dospecialabout doesn't match its definition.
>>  l.4 ${a\over  b
>>               }$
>> Plain format under luatex has no problem here.
>> If I change \over to \times it runs with fonts changed
>> to roman (i.e, not math italics).
>
> taco and i looked into it (fearing big problems) but it's actually  
> normal; use
>
> \everymath = \expandafter{\the\everymath \displaystyle}
>
> or
>
> \appendtoks \displaystyle \to \everymath
>
> as (among other important things) \everymath does initialize \over


And with \frac it can be configured at context low level (why no key  
for \setupmathematics?)

\chardef\mathfracmode=1 % 0=auto, 1=displaystyle, 2=textstyle,  
3=scriptstyle, 4=scriptscriptstyle, 5=mathstyle

$\frac{a}{b}$

Wolfgang

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