ord">auto</span> <span class="identifier">stepper</span> <span class="special">=</span> <span class="identifier">make_controlled</span><span class="special">(</span> <span class="number">1.0e-6</span> <span class="special">,</span> <span class="number">1.0e-6</span> <span class="special">,</span> <span class="identifier">runge_kutta_cash_karp54</span><span class="special">&lt;</span> <span class="identifier">state_type</span> <span class="special">&gt;()</span> <span class="special">);</span>
<span class="i