\begin{table}%t3
\caption{\label{t:poisson4} Non-zero values of the coefficients in Eqs. (\protect\ref{mu}) and (\protect\ref{delta}).}
\small%\centering
\par
\begin{tabular}{@{}ccc@{}}
\hline\hline\noalign{\smallskip}
\multicolumn{1}{c}{$(i,j)$} & \multicolumn{1}{c}{$\mu_{i,j}$} & \multicolumn{1}{c}{$\delta_{i,j}\times(i~n+j~a_1M)/(a_1M)$}  \\[0.5ex]
\hline
$(2,-2)$ & $-(1+\cos{I})~(\cos^2\!J+\cos{I}\cos2J)$
         & $\sin^2\!J~(1+\cos{I})^2$ \vphantom{$\displaystyle K^{K^K}$}
\\[1ex]
$(2,-1)$ & $-2\left[\frac{\sin{I}}{\sin{J}}-(\cos{I}-2\cos2I)\frac{\sin{J}}{\sin{I}}\right]\cos{J}~(1+\cos{I})$
         & $\sin{I}\sin2J~(1+\cos{I})$
\\[1ex]
$(2,0)$ & $2\left[3\cos^2\!J+\cos^2\!I(1-6\cos^2\!J)\right]$
        & ---
\\[1ex]
$(2,1)$ & $2\left[\frac{\sin{I}}{\sin{J}}+(\cos{I}+2\cos2I)\frac{\sin{J}}{\sin{I}}\right]\cos{J}~(1-\cos{I})$
        & $\sin{I}\sin2J~(1-\cos{I})$
\\[1ex]
$(2,2)$ & $-(1-\cos{I})~(\cos^2\!J-\cos{I}\cos2J)$
        & $-\sin^2\!J~(1-\cos{I})^2$
\\[1ex]
$(0,2)$ & $-2\left[\sin^2\!I\cos^2\!J+\cos^2\!I\sin^2\!J\right]$
        & $-2\sin^2\!J~\sin^2\!{I}$
\\[1ex]
$(0,1)$ & $4\cos{I}\cos{J}\left[\frac{\sin{I}}{\sin{J}}+(1-4\sin^2\!I)\frac{\sin{J}}{\sin{I}}\right]$
        & $\sin2I\sin2J$ \\[0.5ex]
\hline
\end{tabular} 
\vspace*{4mm}
\end{table}