Math align with \startcases

Math align with \startcases

[Otared Kavian]

Hi everyone,

This question is primarily intended for Aditya… but I guess other  
fellows on the list can also help me solve the following alignment  
problem:
Is it possible to have an alignment like the rsult of the following  
with \startcases...\stopcases?

\starttext

\startformula
  \startmatrix[align={right,left,right},distance=3pt,left={\left\{},  
right={\right.}]
    \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
    \NC \displaystyle {\partial u \over \partial {\bf n} } \NC{} =  
h(u) \NC \quad\mbox{on } \partial\Omega   \NR
  \stopmatrix
\stopformula

\stoptext

Actually I used to have such alignments with the following structure  
(in good old plain TeX...):

\starttext

\startformula
\cases{
\eqalign{
  -\Delta u + g(u) &= f \cr
  \displaystyle {\partial u \over \partial {\bf n} } &= h(u) \cr
} \quad \eqalign{
&\hbox{in } \Omega \cr
&\vphantom{{\partial u \over \partial {\bf n} }} \hbox{on } \partial 
\Omega \cr
}
}
\stopformula

\stoptext

(which gives approximately the same result as the first example above,  
but clearly the math-alignment structure set up by Aditya and Hans is  
much more elegant. (Although I prefer the vertical distance between  
the lines obtained with my plain TeX structure: by the way is it  
possible to fine tune such things in ConTeXt).
So my question is: whether one can use \startcases ...\stopcases  
instead of \startmatrix ... \stopmatrix in order to obtain the result  
of the plain TeX example?

Thanks in advance: OK
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___________________________________________________________________________________

Re: Math align with \startcases

[Aditya Mahajan]

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On Mon, 19 Jan 2009, Otared Kavian wrote:

> Hi everyone,
>
> This question is primarily intended for Aditya… but I guess other fellows on 
> the list can also help me solve the following alignment problem:
> Is it possible to have an alignment like the rsult of the following with 
> \startcases...\stopcases?
>
> \starttext
>
> \startformula
> \startmatrix[align={right,left,right},distance=3pt,left={\left\{}, 
> right={\right.}]
>  \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
>  \NC \displaystyle {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC 
> \quad\mbox{on } \partial\Omega   \NR
> \stopmatrix
> \stopformula
>
> \stoptext
>
> Actually I used to have such alignments with the following structure (in good 
> old plain TeX...):
>
> \starttext
>
> \startformula
> \cases{
> \eqalign{
> -\Delta u + g(u) &= f \cr
> \displaystyle {\partial u \over \partial {\bf n} } &= h(u) \cr
> } \quad \eqalign{
> &\hbox{in } \Omega \cr
> &\vphantom{{\partial u \over \partial {\bf n} }} \hbox{on } \partial\Omega 
> \cr
> }
> }
> \stopformula
>
> \stoptext
>
> (which gives approximately the same result as the first example above, but 
> clearly the math-alignment structure set up by Aditya and Hans is much more 
> elegant. (Although I prefer the vertical distance between the lines obtained 
> with my plain TeX structure: by the way is it possible to fine tune such 
> things in ConTeXt).
> So my question is: whether one can use \startcases ...\stopcases instead of 
> \startmatrix ... \stopmatrix in order to obtain the result of the plain TeX 
> example?

No, but there is not much difference between cases and matrix. Consider:

\definemathmatrix[alignedcase]
[align={right,left,right},distance=3pt,left={\left\{}, right={\right.},style=\displaystyle]
\starttext

\startformula
\startalignedcase
   \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
   \NC {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC \quad\mbox{on 
} \partial\Omega   \NR
\stopalignedcase
\stopformula

Aditya

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___________________________________________________________________________________

Re: Math align with \startcases

[Otared Kavian]

On 19 janv. 09, at 15:38, Aditya Mahajan wrote:

> On Mon, 19 Jan 2009, Otared Kavian wrote:
>
>> [...]
>> So my question is: whether one can use \startcases ...\stopcases  
>> instead of \startmatrix ... \stopmatrix in order to obtain the  
>> result of the plain TeX example?
>
> No, but there is not much difference between cases and matrix.  
> Consider:
>
> \definemathmatrix[alignedcase]
> [align={right,left,right},distance=3pt,left={\left\{},  
> right={\right.},style=\displaystyle]
> \starttext
>
> \startformula
> \startalignedcase
>  \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
>  \NC {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC \quad 
> \mbox{on } \partial\Omega   \NR
> \stopalignedcase
> \stopformula
>
> Aditya___________________________________________________________________________________

Thanks Aditya: actually an alternative definition in order to get what  
I mentioned in my question is the following:

\starttext
\definemathmatrix[alignedcase]
		[align={right,left,left}, % <---- instead of align={right,left,right}
		distance=3pt,
		left={\left\{},
		right={\right.},
		style=\displaystyle]

\startformula
\startalignedcase
  \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
  \NC {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC \quad 
\mbox{on } \partial\Omega   \NR
\stopalignedcase
\stopformula
\stoptext

Should I add this to the wiki?

Many thanks: OK

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wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Math align with \startcases

[Aditya Mahajan]

On Mon, 19 Jan 2009, Otared Kavian wrote:

>
> On 19 janv. 09, at 15:38, Aditya Mahajan wrote:
>
>> On Mon, 19 Jan 2009, Otared Kavian wrote:
>> 
>>> [...]
>>> So my question is: whether one can use \startcases ...\stopcases instead 
>>> of \startmatrix ... \stopmatrix in order to obtain the result of the plain 
>>> TeX example?
>> 
>> No, but there is not much difference between cases and matrix. Consider:
>> 
>> \definemathmatrix[alignedcase]
>> [align={right,left,right},distance=3pt,left={\left\{}, 
>> right={\right.},style=\displaystyle]
>> \starttext
>> 
>> \startformula
>> \startalignedcase
>> \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
>> \NC {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC \quad\mbox{on } 
>> \partial\Omega   \NR
>> \stopalignedcase
>> \stopformula
>> 
>> Aditya___________________________________________________________________________________
>
> Thanks Aditya: actually an alternative definition in order to get what I 
> mentioned in my question is the following:
>
> \starttext
> \definemathmatrix[alignedcase]
> 		[align={right,left,left}, % <---- instead of 
> align={right,left,right}
> 		distance=3pt,
> 		left={\left\{},
> 		right={\right.},
> 		style=\displaystyle]
>
> \startformula
> \startalignedcase
> \NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
> \NC {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC \quad\mbox{on } 
> \partial\Omega   \NR
> \stopalignedcase
> \stopformula
> \stoptext
>
> Should I add this to the wiki?

Please do.

Aditya
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___________________________________________________________________________________

Re: Math align with \startcases

[Otared Kavian]

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On 19 janv. 09, at 19:49, Aditya Mahajan wrote:

> On Mon, 19 Jan 2009, Otared Kavian wrote:
>> […]
>> Should I add this to the wiki?
>
> Please do.
>
> Aditya

Done:

http://wiki.contextgarden.net/\startcases

Best regards: OK


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________