st: (general statistics) symbol for independent random variables

["FEIVESON, ALAN H. (AL) (JSC-SK) (NASA)" <alan.h.feiveson@nasa.gov>]

Hello - For denoting independent random variables, there doesn't seem to be
any standard notation in the statistical literature other than "i.i.d." to
refer to a group of independently identically distributed RV's. I have
occasionally used something like

  o
X | Y

as a shorthand meaning "X and Y are independent". I am curious as to what
other symbols people use to denote independent random variables - or for
that matter a group of mutually independent RV's. 

Al Feiveson


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