title: gslshell(lua based) returns 0/0 ==0/0 true
body: <p>In gsl-shell ( <a href="http://www.nongnu.org/gsl-shell/" rel="nofollow">a luajit based interface to gsl</a>), I got </p>
  
  <pre><code>&gt; 0/0==0/0
  true
  </code></pre>
  
  <p>while it is <code>false</code> from Lua 5.1.
  Why is it? Does this discrepancy come from Luajit vs Lua, GSL library, or the gsl-shell interface?   </p>