jQuery mobile reference error "a is undefined"

jQuery mobile reference error "a is undefined"

I'm referencing the following jquery files in my header:
<link rel='stylesheet' href='$root/css/jquery.mobile-1.3.2.min.css'>
<script type='text/javascript' src='$root/js/jquery.mobile-1.3.2.min.js'>
</script>
<script type='text/javascript'
src='http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js'>
</script>
I get the following error:
a is undefined
The error references the entire jquery.mobile-1.3.2.min.js file.
Any ideas why this is happening?