[texhax] 3x3 array of alighned equations
Lars Madsen
daleif at imf.au.dk
Wed Nov 2 13:43:50 CET 2005
Novak Elliott :
> Hi,
>
> I'd like to format a 3x3 array of subequations in the form:
>
> a11 = b, a12 = c, a13 = d (1a,b,c)
> -
> e
>
> a21 = f, 3 x a22 = ... (1d,e,f)
> -
> g
>
> a22 = .. (1g,h,i)
>
> i.e. I want them aligned horizontally between the three columns and also I want them aligned to the = sign within each column. So I effectively have 9 columns, or 3 columns each with 3 subcolumns. The eqnarry environment only allows the alignment to work with one equation per line, and the array environment typesets fractions in a tiny font so that they fit within one text line. However, I want them to be at full size like in an ordinary equation. I have a hack for getting the subequation numbering to work without using the subequations environment so that shouldn't be a drama. If there is a way to produce an array that allows left/centre/right alignment and also allows fractions to be typeset at full size then that would almost certainly work.
>
the amsmath package and the alignat env might help
\begin{alignat*}{3} % three alignments
a&=b & &=c & &=d\\
a&=bbbb & &=c & &=d\\
a&=bb & &=c & &=d
\end{alignat*}
there needs to be 2n-1 &'s in each line, where n is the number of
alignments, the extra two &'s in the example above separates the
alignments.
/daleif
``You cannot help men permanently by doing for them
what they could and should do for themselves. ''
-- Abraham Lincoln
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