ws: <span class="math display">\[\begin{equation}
    \mu_{\bigtriangledown_{\downarrow}}(x_{jk}):=
    \begin{cases}
        \displaystyle\frac{x_{jk}-\mathrm{min}}{\mathrm{max}-\mathrm{min}},&amp;\mathrm{min}\leq x_{jk}\leq v_{p-1}\\
        1,&amp;v_{p-1}&lt;x_{jk}\leq \mathrm{max}\\
        0,&amp;\mathrm{otherwise}
    \end{cases},
\end{equation}\]</span> where <span class="math inline">\(\mathrm{min},\mathrm{max}\)</span> and <span class="math inline">\(\gamma\)</span> are the same as in Definition 4.