Two symbols questions and one about graphics
Brett W
I was wondering:
a) In amsmath or any other package, is it possible to have a diagonal
ellipsis starting from the bottom left going to the top right? Or
alternatively, is there something that can arbitrarily reverse symbols?
b) How do you do a twiddle underneath a letter, as in vector notation? I
know of the \vec command, but we're used to the twiddle version.
c) Are there any good programs for Win98 for eps graphics that work well
with Miktex?
BrettW
Peter Neergaard
BW> a) In amsmath or any other package, is it possible to have a
BW> diagonal
BW> ellipsis starting from the bottom left going to the top right? Or
BW> alternatively, is there something that can arbitrarily reverse
BW> symbols?
The symbol \ddots is not a fundamental symbol, but is built from three
periods. You can therefore build you own diagonal dots in the
following way
\makeatletter
\def\ddots{\mathinner{\mkern1mu\raise\p@
\vbox{\kern4\p@\hbox{.}}\mkern2mu
\raise7\p@\hbox{.}\mkern2mu\raise\p@\hbox{.}\mkern1mu}
\makeatother
which is simply the standard \ddots with the raising of the first and
the last period swapped.
Sorry, but I don't know the answers to you two other questions.
Peter
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Rupert Levene
Brett W wrote:
>
> Hi all
>
> I was wondering:
>
> b) How do you do a twiddle underneath a letter, as in vector notation? I
> know of the \vec command, but we're used to the twiddle version.
The usual approach is to use boldface (the twiddles are handwritten
shorthand to tell the typesetter to set bold, apparently). However, one
of the following two macros will do what you want
\usepackage{amsmath}
\newcommand{\tvec}[1]{\underset{\raise.2ex\hbox{${\sim}$}}{#1}}
\newcommand{\Tvec}[1]{\underset{\tilde{}}{#1}}
$\tvec{x}\cdot\tvec{y} = \Tvec{y}\cdot \Tvec{z}$
but neither is terribly pretty.
>
> c) Are there any good programs for Win98 for eps graphics that work well
> with Miktex?
Coreldraw and Illustrator are reputed to work. You could also look at
getting an x server for windows (there are free ones but i don't know if
you need a version of nt) and using the conventional unix tools like
xfig. Also consider things like pstricks.
Rupert
Donald Arseneau
> b) How do you do a twiddle underneath a letter, as in vector notation? I
> know of the \vec command, but we're used to the twiddle version.
A tilde underneath. Use accents.sty.
Donald Arseneau as...@triumf.ca