type</span> <a name="boost.numeric.odeint.checked_steppe_idp18950048.deriv_type"></a><span class="identifier">deriv_type</span><span class="special">;</span>  
  <span class="keyword">typedef</span> <span class="identifier">stepper_type</span><span class="special">::</span><span class="identifier">time_type</span>  <a name="boost.numeric.odeint.checked_steppe_idp18950048.time_type"></a><span class="identifier">time_type</span><span class="special">;</span>   

  <span class="comment">// <a class="link" href