class="math inline">\(v_{i+1}^*\)</span> are interval limits right next to m.</p>
</div>
<div id="trapezoidal-membership-function" class="section level3">
<h3 class="hasAnchor">
<a href="#trapezoidal-membership-function" class="anchor"></a>Trapezoidal Membership Function</h3>
<p><strong>Definition 7 (Left Trapezoidal)</strong>. From Definition 4, the <em>lower</em> or <em>left trapezoidal</em> MF, herein notated as <span class="math inline">\(\mu_{\bigtriangledown_{\downarrow}}\)</span>, is defined as follo