}else if(document.getElementById("aq8_4").checked) {
        document.getElementById("reply_quest_9").innerHTML = "Almost. Note that the two last loops from the cross are not really nested.";
    }else {
        document.getElementById("reply_quest_9").innerHTML = "You have to chose some answer first.";
    }
}
    </script>
  </head>
  <body>
    <center>
    <h1>
Complexity
    </h1>
    <p>

    <div style="width:505pt;">
    <pre>
def cross_of(A):
  ''' n-dimensional cross product on (n-1) vectors in li