jquery(function) not working but $(function) works

jquery(function) not working but $(function) works

Hi, I am just starting with jquery and following a bob tabor tutorial, when I use the full jquery ready function it fails to fire but the shortened $ version works, I accept that since it works then maybe I should just use it but while getting to know this great tool confusion and doubt are not good for me, when I run the script with full ready function and use f12 dev tool it tells me that this URI cannot be found " http://ajax.aspnetcdn.com/ajax/jquery/jquery.min.map" but in my script I am using the ms cdn
<script type="text/javascript" src=" http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.9.0.min.js"></script> so I guess my question is where is this other unfound URI coming from

Ron