13 Sep
2005
13 Sep
'05
5:13 p.m.
I should follow my own advice! As the TeXbook points out, Plain TeX has a perfectly good \cases command which is also present in ConTeXt, and which you use like this:
P_{r-j} = \cases{ 0 & if $r-j$ is odd,\cr r!(-1)^{(r-j)/2} & if $r-j$ is even.\cr }
Note that, in this version, the text in the second column is _not_ enclosed in a \text command; the \cases command handles that automatically.
Thank you very much. This is just what I need. jk -- // Jilani KHALDI http://jkhaldi.oltrelinux.com