"300">sequence of HT</td></tr>
<tr><td width="150"><a href="html/trchain.html">trchain</a></td><td width="300">transform chain in 3D</td></tr>
<tr><td width="150"><a href="html/trchain2.html">trchain2</a></td><td width="300">sequence of HT</td></tr>
<tr><td width="150"><a href="html/trchain2.html">trchain2</a></td><td width="300">transform chain in 2D</td></tr>
<tr><td width="150"><a href="html/trexp.html">trexp</a></td><td width="300">efficient exponentiation</td></tr>
<tr><td width="150"><a href="html/tre