Example for <a href="https://en.wikipedia.org/wiki/nonlinear_programming" class="extiw" title="w:nonlinear programming">nonlinear programming</a>.
<a href="//commons.wikimedia.org/wiki/User:Krishnavedala" title="User:Krishnavedala">Krishnavedala</a>
<span class="int-own-work" lang="en">Own work</span>