                              <span class="identifier">size_t</span> <span class="identifier">n</span> <span class="special">=</span> <span class="number">18</span><span class="special">,</span>
                                    <span class="identifier">size_t</span> <span class="identifier">approximation_order</span> <span class="special">=</span> <span class="number">3</span><span class="special">);</span>

        <span class="keyword">template</span><span class="special">&lt;</span><span class="keywor