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\documentclass{article}
\begin{document}
\begin{table}
\centering
\caption{CQs in Convex Optimization Summary of New Connections}
\begin{tabular}{|ccccc|}
\hline
\multicolumn{5}{|c|}{\textbf{Without convexity of $g_j,\,j=1, 2, \ldots, m$}} \\ \hline
Robinson's CQ & $\Leftrightarrow$ & Slater and Nodegeneracy Condition & $\Rightarrow$ & G-S strong CHIP \\
$\Downarrow\not\Uparrow$ & & $\Downarrow\not\Uparrow$ & & $\Downarrow\not\Uparrow$ \\
Nodegeneracy Condition & & Slater Condition & $\Rightarrow$ & Strong CHIP \\
$\not\Downarrow\not\Uparrow$ & & $\not\Downarrow\not\Uparrow$ & & \\
G-S strong CHIP & & G-S strong CHIP & & \\ \hline
\hline
\multicolumn{5}{|c|}{\textbf{With convexity of $g_j,\,j=1, 2, \ldots, m$}} \\ \hline
Slater Condition & $\Rightarrow$ & Nodegeneracy Condition & $\not\Rightarrow$ & Slater Condition \\
Slater Condition & $\Leftrightarrow$ & Robinson's CQ & $\Rightarrow$ & G-S strong CHIP \\ \hline
\end{tabular}
\end{table}
\end{document}
نتیجه:
