[texhax] "big O" and "little O" notation in amsmath

[John Wheeler]

I use the amsmath package and would like to have implemented the
"big O" and "little O" notations for specifying the behavior of a function
in a limit.  I've looked at the .sty file and done a little experimentation,
but to no avail.  Can anyone tell me if they are available in the package,
and if so what is the usage?  Also, is a manual or other descriptive document
available? and if so, where?

Thanks,
John Wheeler
jcw at chemj2.ucsd.edu