ConTeXt: Math displ: $$ vs.\startformula

ConTeXt: Math displ: $$ vs.\startformula

[Tobias Burnus]

Hi,

whats the exact difference between $$ and \start/stopformula -- or why
does this work

  \platziereformel[test]{a}$$a+b+c=\ln (x/y) = \ln x - \ln y$$

and why does this not

  \platziereformel[test]{a}%
    \startformel
      a+b+c=\ln (x/y) = \ln x - \ln y
    \stopformel

Tobias

Re: ConTeXt: Math displ: $$ vs.\startformula

[Taco Hoekwater]

>>>>> "TB" == Tobias Burnus <burnus@gmx.de> writes:

 TB> Hi, whats the exact difference between $$ and \start/stopformula
 TB> -- or why does this work

 TB>   \platziereformel[test]{a}$$a+b+c=\ln (x/y) = \ln x - \ln y$$

 TB> and why does this not

 TB>   \platziereformel[test]{a}% \startformel a+b+c=\ln (x/y) = \ln x
 TB> - \ln y \stopformel

Removing the % after \platziereformel here should remove the problem.
\platziereformel gobbles an extra argument to get rid of a possible
space between itself and the start of the formula. This fails if the
next thing is a macro instead of a 'tex command' like $$ and the is NO
space.

Taco

Re: ConTeXt: Math displ: $$ vs.\startformula

[Tobias Burnus]

Taco Hoekwater wrote:
> Removing the % after \platziereformel here should remove the problem.
> \platziereformel gobbles an extra argument to get rid of a possible
> space between itself and the start of the formula. This fails if the
> next thing is a macro instead of a 'tex command' like $$ and the is NO
> space.

Well using
\platziereformel[alpha]{a}
$$
\int x\,{\rm d}x
$$
\bye

works, but this doesn't:
\platziereformel[alpha]{a}
\startformel
\int x\,{\rm d}x
\stopformel
\bye

!> Runaway argument?
!> a \startformel \int x\,{\rm d}x \stopformel \bye 
!> ! Paragraph ended before \dodoplaatsformule was complete.
!> <to be read again> 
!>                   \par 
!> l.6 

-----------------------
[mframed]
>  TB> It looks as if the former is printed in textstyle.
> 
> There is. We were at Dante, so this reply is a little late.
Doesn't matter, I simply used \displaystyle. Did they like eetex?
\formulenummer
Tobias

Re: ConTeXt: Math displ: $$ vs.\startformula

[Hans Hagen]

Tobias Burnus wrote:

> works, but this doesn't:
> \platziereformel[alpha]{a}
> \startformel
> \int x\,{\rm d}x
> \stopformel

You're right. The subnumber spec interferes. I send you a patch in a
seperate mail. The next specs are all valid now: 

\platziereformel[alpha]$$\int x\,{\rm d}x$$
\platziereformel[alpha]$$\int x\,{\rm d}x$$
\platziereformel[alpha] $$\int x\,{\rm d}x$$
\platziereformel[alpha]{a}$$\int x\,{\rm d}x$$
\platziereformel[alpha]{a} $$\int x\,{\rm d}x$$
\platziereformel[alpha] {a} $$\int x\,{\rm d}x$$
\platziereformel[alpha]\startformel \int x\,{\rm d}x \stopformel
\platziereformel[alpha] \startformel \int x\,{\rm d}x \stopformel
\platziereformel[alpha]{a}\startformel \int x\,{\rm d}x \stopformel
\platziereformel[alpha]{a} \startformel \int x\,{\rm d}x \stopformel
\platziereformel[alpha] {a}\startformel \int x\,{\rm d}x \stopformel

\bye, 

Hans 

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                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
    tel: 038 477 53 69 | fax: 038 477 53 74 | mail: pragma@wxs.nl

                     ConTeXt and PPCHTeX site: www.ntg.nl/context
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Re: ConTeXt: Math displ: $$ vs.\startformula

[Hans Hagen]

Tobias Burnus wrote:

> whats the exact difference between $$ and \start/stopformula -- or why

\placeformula ... \startformula ... \stopformula 
   :: correct spacing, referencing, formulanumber

\placeformula ... $$ ... $$
   :: the same, but $$ is useless in editor based syntax checking

$$ ... $$
   :: the pure tex way, fuzzy spacing

\startformula ... \stopformula
   :: well defined spacing, consistent with other spacing

So, I suggest to avoid the $$ alternatives. 

> does this work ...

See taco's answer. 

Hans

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
    tel: 038 477 53 69 | fax: 038 477 53 74 | mail: pragma@wxs.nl

                     ConTeXt and PPCHTeX site: www.ntg.nl/context
-----------------------------------------------------------------