lass="w">    </span><span class="kd">::</span><span class="w"> </span><span class="n">eps</span>

<span class="n">doubleprecision</span><span class="w">    </span><span class="kd">::</span><span class="w"> </span><span class="n">tol</span>
<span class="n">doubleprecision</span><span class="w">    </span><span class="kd">::</span><span class="w"> </span><span class="n">tr</span>
<span class="n">doubleprecision</span><span class="w">    </span><span class="kd">::</span><span class="w"> </span><span class="n">