M-Math; \placeformula[-] and \displaylines cause problems

M-Math; \placeformula[-] and \displaylines cause problems

[Tobias Burnus]

Hi,

After some investigational work I nailed it down to a m-math.tex
problem, which redefines \dodoplaatsformule and \dostartformula.

I have this (bigger than neccessary testcase):
-----------------<cut>--------------------------
\setupbodyfont[ams]\x13
\usemodules[math]
\def\bfC{{\Bbb C}}
\definefont [rsfst][rsfs10 sa \currentfontscale]
\def\rsfs#1{\ifmmode\hbox\fi{\rsfst#1}}

%\placeformula[-] % -- doesn't work, why?
%\startformula % -- doesn't work, but $$ does, why?
$$
\displaylines{
  \langle\phi|\chi\rangle\in\bfC, \quad\rsfs H\cdot\!\!\rsfs H\in\bfC\cr
  \langle\phi|\chi\rangle=\langle\chi|\phi\rangle^*\cr}
$$
%\stopformula  % -- doesn't work, but $$ does, why?
\bye
-----------------<cut>--------------------------
If I use \start|stopformula instead of $$ I get an error
If I use \placeformula[-] I get an error.

If I don't use the m-math.tex module, I get no error either way.

I really miss a proper documentation of m-math.tex. (I have no idea how
to use \overrightarrow, but \overset works, so I don't mind).

Tobias

-- 
This above all: To thine own self be true / And it must follow as the
night
the day / Thou canst not then be false to any man

Re: M-Math; \placeformula[-] and \displaylines cause problems

[Hans Hagen]

At 07:51 PM 11/11/00 +0100, Tobias Burnus wrote:

>If I use \start|stopformula instead of $$ I get an error
>If I use \placeformula[-] I get an error.

In a couple of weeks I will clean up the math module, that is, when taco
has frozen it. 

>If I don't use the m-math.tex module, I get no error either way.
>
>I really miss a proper documentation of m-math.tex. (I have no idea how
>to use \overrightarrow, but \overset works, so I don't mind).

Isn't much the same as in ams math? I seldom use such math myself -) 

Hans
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                                                  Hans Hagen | PRAGMA ADE
                      Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
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Re: M-Math; \placeformula[-] and \displaylines cause problems

[Tobias Burnus]

Hi Hans,

> >If I use \start|stopformula instead of $$ I get an error
> >If I use \placeformula[-] I get an error.
> In a couple of weeks I will clean up the math module, that is, when taco
> has frozen it.
I'm looking forward to it. I also would like to see a improved
documentation
of m-math. So I can use it right away without needing to find extra
documentation. (In an ideal world I won't need to look into any book,
but
the ConTeXt documentation and -- maybe the TeX Book.)
I would therefore also like to see a page in the manual which lists all
Math symbols and the math and text accents (for CM at least).

> >I really miss a proper documentation of m-math.tex. (I have no idea how
> >to use \overrightarrow, but \overset works, so I don't mind).
> Isn't much the same as in ams math? I seldom use such math myself -)
Well, I only looked in $TEXMF/doc/amstex/amsguide.dvi, but I found
nothing.

Tobias

Re: M-Math; \placeformula[-] and \displaylines cause problems

[S2P development]

Tobias Burnus wrote:
> 
> Hi,
> 
> After some investigational work I nailed it down to a m-math.tex
> problem, which redefines \dodoplaatsformule and \dostartformula.
> If I don't use the m-math.tex module, I get no error either way.

Both are essentially the same problem. m-math adds support for 
'fleqn' and 'leqno' style settings, but this means that the current
version executes this:

\hbox to \hsize{$\displaystyle *formula* $}

And \halign is not legal in 'normal' inline math mode.

This actually works:

\placeformula[-]
\startformula
\vcenter{$$
\displaylines{...}
$$}
\stopformula

But I'm not too happy about pasting that into the module 
code before I've had a chance to test it's behaviour under other
(weird) conditions.

Greetings, Taco

Re: M-Math; \placeformula[-] and \displaylines cause problems

[Hans Hagen]

At 01:20 PM 11/14/00 +0100, S2P development wrote:
>Tobias Burnus wrote:
>> 
>> Hi,
>> 
>> After some investigational work I nailed it down to a m-math.tex
>> problem, which redefines \dodoplaatsformule and \dostartformula.
>> If I don't use the m-math.tex module, I get no error either way.
>
>Both are essentially the same problem. m-math adds support for 
>'fleqn' and 'leqno' style settings, but this means that the current
>version executes this:
>
>\hbox to \hsize{$\displaystyle *formula* $}
>
>And \halign is not legal in 'normal' inline math mode.
>
>This actually works:
>
>\placeformula[-]
>\startformula
>\vcenter{$$
>\displaylines{...}
>$$}
>\stopformula
>
>But I'm not too happy about pasting that into the module 
>code before I've had a chance to test it's behaviour under other
>(weird) conditions.

right, i also remember making a hack for wang lei with regards to this, so
it needs some attention

Hans
-------------------------------------------------------------------------
                                                  Hans Hagen | PRAGMA ADE
                      Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------