Some $\mframed{math}$ questions

Some $\mframed{math}$ questions

[Mojca Miklavec]

Hello,

I would like to ask a couple of questions about frames and numbers in
math formulas.

1. What's the best way to frame a formula like here:

\placeformula
\startformula
\mframed{x^2+y^2=z^2}
\stopformula

The problem is that:
- formula number is shifted downwards in comparison to the formula
without a number
- I don't know how to do the settings (frame color, frame offset)
globally. There's no \setupmframed[...] command. It's probably
possible to use a sort of
\setupframed[whatever_setting_influencing_only_mframed],
but I don't know how.

2. What's the general strategy when doing evel stuff with formula
numbering? I would like to use \eqalign and then number formulas like
on the following example:

z^2=x^2+y^2    (1)
   =(x'-x_0)^2+(y'-y_0)^2 % no number
   =R^2\cos^2(\phi)    (2)

Can I somehow number the formulas (1), (2), (3.a), (3.b), (3.c), (4),
(5.1), (5.2)? I would like to manually provide where to start and stop
numbering with x.a or x.1, x.2.

3. How can I put more than one equation in a row and number all of
them (as if they were placed in three columns)?

4. How can I move the formula number one row lower in case that the
formula is too long and if it would overlap with the formula number
otherwise?

Thank you very much for any help,
    Mojca

Re: Some $\mframed{math}$ questions

[Aditya Mahajan]

<--- On Dec 2, Mojca Miklavec wrote --->

> 1. What's the best way to frame a formula like here:
>
> \placeformula
> \startformula
> \mframed{x^2+y^2=z^2}
> \stopformula
>
> The problem is that:
> - formula number is shifted downwards in comparison to the formula
> without a number
> - I don't know how to do the settings (frame color, frame offset)
> globally. There's no \setupmframed[...] command. It's probably
> possible to use a sort of
> \setupframed[whatever_setting_influencing_only_mframed],
> but I don't know how.

Sorry, no idea on how to do this.


> 2. What's the general strategy when doing evel stuff with formula
> numbering? I would like to use \eqalign and then number formulas like
> on the following example:
>
> z^2=x^2+y^2    (1)
>   =(x'-x_0)^2+(y'-y_0)^2 % no number
>   =R^2\cos^2(\phi)    (2)
>

The following works.  I still find the amsmath way of doing this much 
easier, but equation numbering has not been ported to amsl module

\starttext
\placeformula
\startformula
\eqalignno{
z^2 &=x^2+y^2  &\formulanumber\cr
     &=(x'-x_0)^2+(y'-y_0)^2 & \cr% no number
     &=R^2\cos^2(\phi) &\formulanumber\cr
}
\stopformula

\stoptext



> Can I somehow number the formulas (1), (2), (3.a), (3.b), (3.c), (4),
> (5.1), (5.2)? I would like to manually provide where to start and stop
> numbering with x.a or x.1, x.2.

Have a look at the wiki http://wiki.contextgarden.net/Math for the 
manual way to number each subformula. I think one can define a 
\start(stop)subformula[format = ??] to put a \place(sub)formula 
automatically. But I do not know how to define such an environment 
properly.


> 3. How can I put more than one equation in a row and number all of
> them (as if they were placed in three columns)?

One way to cheat can be to start a three column mode

\starttext

\startcolumns[n=3,tolerance=verytolerant]
\placeformula
\startformula
  E = mc^2
\stopformula
\column
\placeformula
\startformula
  E = mc^2
\stopformula
\column
\placeformula
\startformula
  E = mc^2
\stopformula
\stopcolumns
\stoptext

Again, one could define a start-stop environment for this.

> 4. How can I move the formula number one row lower in case that the
> formula is too long and if it would overlap with the formula number
> otherwise?

Not sure what you mean here. Context (rather tex, I think) does this 
by default

\starttext

\placeformula
\startformula
a = bbbbbbbbbbbbbbbbbbbbbbbb ddddddddddddddddddddddddddd ccccccccccc 
eeeeeeeeeeeeee fffffffffffffffff ggggggggggggggggggg
\stopformula
\stoptext

HTH,
Aditya

Re: Re: Some $\mframed{math}$ questions

[Mojca Miklavec]

Aditya Mahajan wrote:
> Mojca Miklavec wrote:
>
> > 1. What's the best way to frame a formula like here:
> >
> > \placeformula
> > \startformula
> > \mframed{x^2+y^2=z^2}
> > \stopformula
> >
> > The problem is that:
> > - formula number is shifted downwards in comparison to the formula
> > without a number
> > - I don't know how to do the settings (frame color, frame offset)
> > globally. There's no \setupmframed[...] command. It's probably
> > possible to use a sort of
> > \setupframed[whatever_setting_influencing_only_mframed],
> > but I don't know how.

...

> Have a look at the wiki http://wiki.contextgarden.net/Math for the

Thank you very much and sorry for my stupidity for not taking a closer
look to the wiki :(. This solved all the questions I had (except for
\mframed), I would only like to ask how to cite the equation numbers
made with \[sub]formulanumber.

\formulanumber[xx]

and then simply using \in[xx] doesn't work.

Thanks,
    Mojca