Le Thursday 13 March 2008 13:23:06 Aditya Mahajan, vous avez écrit :
> On Thu, 13 Mar 2008, Morgan Brassel wrote:
> > Hi everyone,
> >
> > I read carefully the two 'My Way' from Aditya regarding math alignment
> > (thank you for those, they were extremely useful to me, and should maybe
> > get even more visibility on the wiki), and I have some questions about
> > it:
> >
> >
> > 1) Is there a way to modify interline spacing in 'cases' environment? I
> > find it a bit short when using the displaystyle option.
>
> There is no clean way to do this at the moment. You can force a looser
> interline by adding \noalign{\vskip ...} after \NR.

Ok, I'll do that. This is the \needspace command described in your 'My Way', 
isn't it? I should have remembered it!

> > 2) I noticed that the interline spacing is not the same in the 'align'
> > and 'aligned' environment (it's larger in 'align'). Is there a way to
> > make 'aligned' use the spacing of align? It looks better with
> > displaystyle maths.
>
> I do not like the definition of aligned using matrices that I have
> presented in the 'My Way'. Matrices try very hard to have a compact
> interline spacing, while in a aligned environment you need the opposite.
> At some point, I played with some of the internals of core-mat, and had
> a working definition of aligned. I cannot find it at the moment :(

Maybe another solution would be to add left and right options directly to the 
align environment. But of course I have no idea if it is possible... Anyway, 
if you find your new definition back, I would be glad to test it!

> > 3) Aditya, I saw your remark in your 'My Way' concerning the 'multline'
> > environment. I must admit I would really be glad to see it appear in
> > ConTeXt! I'm afraid I'm not able to implement it myself... I use it a
> > lot with amsmath: when a formula is just too long for one line, I put it
> > on two with multline. The first part of the formula is left aligned on
> > the first line, and the second part is right aligned on the second line.
> > It seems impossible to get the same result with only 'align'. Would it be
> > difficult to make it available in ConTeXt?
>
> No, multline is probably the simplest of all math environments. I do not
> really understand what all features it should have. If you can explain
> everything you want from a multiline environment, I can give a shot at
> trying to implement that, and Hans and Taco could polish it up.
>
> Aditya

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!

Morgan
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