>
<tr><td valign="top"><a href="#umerge3-3">umerge3/3</a></td><td>
  Returns the sorted iterator formed by merging <code>Iterator1</code>,
  <code>Iterator2</code>, and <code>Iterator3</code>.</td></tr>
<tr><td valign="top"><a href="#unfold-2">unfold/2</a></td><td>
  Construct a new iterator from a <code>Fun(AccIn)</code> function and an
  initial accumulator value <code>Acc0</code>.</td></tr>
<tr><td valign="top"><a href="#uniq-1">uniq/1</a></td><td>  
Returns an iterator containing the elements of Iterato