Re: A few questions about aligned maths

[Aditya Mahajan <adityam@umich.edu>]

On Thu, 13 Mar 2008, Morgan Brassel wrote:

> Concerning multline, I only read the specification given in amsldoc.pdf:
> "3.3 Split equations without alignment". Multline does not support alignment,
> so you can't put '&' inside it, only '\\'. All it does is cut the equation
> into several lines: the first is left aligned, the last is right aligned, and
> all the intermediate are centered. I don't if this is sufficient as an
> explanation. Please let me know if I can help or test. And thank you for your
> time!

So, will this user interface be enough:

\startformula \startmultline
   \NC line 1 \FR
   \NC line 2 \MR
   \NC line 3 \LR
\stopmultline \stopformula

Lines with \FR are flush left, lines with \MR are centered, and lines with 
\LR are right flushed. (First row, middle row, last row; as in tables). 
multline also has \pushleft and \pushright with go against the ConTeXt way 
of things.

It is also possible to just have \NR at each row, and let ConTeXt figure 
out the correct flushing. That will involve a two-pass algorithm, and I 
will give that a try.

The other thing is placement of equation numbers. It is easy to implement 
multline so that equation number is always centered. I am not sure if the 
current ConTeXt mechanism allows for equation number to be placed on the 
bottom (similar to tbtags options).

Aditya
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