# [NTG-context] Updated My Way on math alignment

Fri Aug 4 17:59:08 CEST 2006

Hi Wim,

On Fri, 4 Aug 2006, WN wrote:

> I have a question about \startcases .. \stopcases.
> I am trying to adjust the distance of the cases and the right brace, the
> left brace is empty,
> see example below. Is this possible ?

It is. You can do it in different ways, depending on what you like.

> % Example
> \starttext
> \startformula
> *\startcases[left={\left.},right={\right\}}]*
> \NC (\lambda + \mu ) \cdot a = \lambda \cdot a + \mu \cdot a \NC \NR
> \NC \lambda ( a + b ) = \lambda \cdot a + \lambda \cdot b  \NC \NR
> \stopcases
> \text{(distributieve eigenschappen)}
> \stopformula
> \stoptext

\starttext

The original one.

\startformula
\startcases[left={\left.},right={\right\}}]
\NC (\lambda + \mu ) \cdot a = \lambda \cdot a + \mu \cdot a \NC \NR
\NC \lambda ( a + b ) = \lambda \cdot a + \lambda \cdot b  \NC \NR
\stopcases
\text{(distributieve eigenschappen)}
\stopformula

You can reduce the \quotation{width} of the cases,

\startformula
\startcases[left={\left.},right={\right\}},numberdistance=0pt]
\NC (\lambda + \mu ) \cdot a = \lambda \cdot a + \mu \cdot a \NC \NR
\NC \lambda ( a + b ) = \lambda \cdot a + \lambda \cdot b  \NC \NR
\stopcases
\text{(distributieve eigenschappen)}
\stopformula

or use a matrix (only one column)

\startformula
\startmatrix[left={\left.},right={\right\}}]
\NC (\lambda + \mu ) \cdot a = \lambda \cdot a + \mu \cdot a \NR
\NC \lambda ( a + b ) = \lambda \cdot a + \lambda \cdot b    \NR
\stopmatrix
\text{(distributieve eigenschappen)}
\stopformula

maybe a right aligned one

\startformula
\startmatrix[left={\left.},right={\right\}},align=right]
\NC (\lambda + \mu ) \cdot a = \lambda \cdot a + \mu \cdot a \NR
\NC \lambda ( a + b ) = \lambda \cdot a + \lambda \cdot b    \NR
\stopmatrix
\text{(distributieve eigenschappen)}
\stopformula

and this is how I would do it

\definemathmatrix[aligned][n=2,align={right,left},distance=0pt]

\startformula
\startaligned[left={\left.},right={\right\}}]
\NC (\lambda + \mu ) \cdot a \NC{} = \lambda \cdot a + \mu \cdot a
\NR
\NC \lambda ( a + b ) \NC {}= \lambda \cdot a + \lambda \cdot b
\NR
\stopaligned
\text{(distributieve eigenschappen)}
\stopformula