nt forms must be specified by using the names shown below with
    the trailing <code>'2'</code>. The single-argument forms with the
    trailing <code>'1'</code> are provided for symmetry and to enable certain
    applications of the <a href="#chaining">base class chaining</a>
    technique.</p>

    <h4><a name="mixed_arithmetics">Mixed Arithmetics</a></h4>

    <p>Another application of the two-argument template forms is for mixed
    arithmetics between a type <code>T</code> and a type <code>U</code> th