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$$\begin{array}{l|llllll}
\textbf{Relations on}\; \mathbb{Z}: & \quad < & \qquad \leq & \qquad = & \qquad \mid & \qquad \nmid & \qquad \neq \\
\hline \hline \text{Reflexive} & \quad \text{no} &\qquad \text{yes} & \qquad \text{yes} & \qquad \text{yes} &\qquad \text{no} & \qquad\text{no} \\
\text{Symmetric} & \quad \text{no} &\qquad \text{no} & \qquad \text{yes} & \qquad \text{no} &\qquad \text{no} & \qquad\text{yes}\\
\text{Transitive} & \quad \text{yes} &\qquad \text{yes} & \qquad \text{yes} & \qquad \text{yes} &\qquad \text{no} & \qquad\text{no}
\end{array}$$
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