question: \ddots in the other direction

[Neil Zanella]

Hello,

Is there a command that produces the same effect as the \ddots
command except that the dots go in the opposite (SW-NE) direction?
If so then what is the name of the command and what usepackage do
I need to include to use it?

Thanks,

Neil

[Martti Nikunen]

On 13 Dec 2000 10:23:47 +0100, Stefan Ulrich <ulr...@cis.uni-muenchen.de> wrote:

>Neil Zanella <nzan...@cs.mun.ca> writes:
>
>> Is there a command that produces the same effect as the \ddots
>> command except that the dots go in the opposite (SW-NE) direction?
>

>Not predefined, but it's easy to derive one from the original
>definition of \ddots (from fontmath.ltx).
>
>--
>Stefan Ulrich

Here is something I found from old news

%%iddots.sty
%%
%% Stefan Parkvall, June 24, 1997
%%

\def\iddots{\mathinner{\mkern1mu\raise\p@
\vbox{\kern7\p@\hbox{.}}\mkern2mu
\raise4\p@\hbox{.}\mkern2mu\raise7\p@\hbox{.}\mkern1mu}}

and the following comment by Daniel Luecking

To properly match plain's \ddots, the boxes should probably be reversed
also (i.e., the tall \vbox comes last):

\def\iddots{\mathinner{\mkern1mu\raise\p@
\hbox{.}\mkern2mu\raise4\p@\hbox{.}\mkern2mu
\raise7\p@\vbox{\kern7\p@\hbox{.}}\mkern1mu}}

Martti Nikunen
Department of Mathematics, University of Helsinki
martti....@helsinki.fi