led in
Önal and Briers (2006) and Cardeira <em>et al.</em> 2010. For an
example that has used these constraints, see Hanson <em>et al.</em> (2019).
Please note
that these constraints require the expanded formulation and therefore
cannot be used with feature data that have negative vales.
<strong>Please note that adding these constraints to a problem will
drastically increase the amount of time required to solve it.</strong></p>
    </div>
    <div class="section level2">
    <h2 id="data-format">Data forma