I was told by Phil Dawid that the symbol for conditional
independence was proposed to resemble perpendicularity symbol \perp
The motivation was that it can be interpreted as an analogue of
perpendicularity. Quite elegant symbol for that is then
\def\ci{\perp\!\!\!\perp}
which allows to denote that A is conditionally independent of B
given C with respect to P (probability distribution if necesary)
as follows
$A\ci B \,|\, C \,\,[P]$
I follow Phil's advice concerning notation several years.
The proposal given by Jeff Bilmes which used \bot instead is also a good
solution.
Let me propagate my proposal how to denote conditional DEPENDENCE,
i.e. negation of conditional independence. One can use
\def\dep{\top\!\!\!\top}
which gives something like the symbol for conditional independence
but rotated 180 degrees. It looks better than 'crossed' symbol
of conditional independence.
Regards from
Milan Studeny
On Mon, 7 May 2001, Richard Dybowski wrote:
> Many papers that discuss graphical models use a symbol to denote
> conditional independence. The symbol is like the semantic entailment
> 'turnstile' symbol used by logicians but rotated 90 degrees anticlockwise.
> Can anyone please tell me where I can obtain a LaTeX font that contains
> this symbol so that I can incorporate the symbol into a paper I am writing
> in LaTeX? Or is there an alternative way of producing this symbol for LaTeX?
>
> Regards,
>
> Richard
> -------------------------------
> Richard Dybowski, 143 Village Way, Pinner, Middlesex HA5 5AA, UK
> Tel (mobile): 079 76 25 00 92
>
