\begin{table} %\caption{This table shows the temporal evolution of the eigenvalues %and eigenvectors as a function of the look-back time in Gyr (column %1). The three eigenvalues are in columns (2) to (4) and the %corresponding eigenvectors are in columns (5) through (13). The %headers are self explanatory. We have highlighted the most negative %values (column 4) and the corresponding eigenvectors (column 11 %through 13) for all values of the look-back time at which the most %negative eigenvalue keeps its sign.} % %\centerline {\begin{tabular}{|crrrrrrrrrrrr|} % \hline %$t_{{\rm lb}}$ & $\lambda _1 $ & $\lambda _2 $ & $\lambda _3 $ & $n_{{\rm x}}^{\left( {\lambda _1 } \right)} $ & $n_{\rm y}^{\left( {\lambda _1 } \right)} $ & $n_{\rm z}^{\left( {\lambda _1 } \right)} $ & $n_{\rm x}^{\left( {\lambda _2 } \right)} $ & $n_{\rm y}^{\left( {\lambda _2 } \right)} $ & $n_{\rm z}^{\left( {\lambda _2 } \right)} $ & $n_{\rm x}^{\left( {\lambda _3 } \right)} $ & $n_{\rm y}^{\left( {\lambda _3 } \right)} $ & $n_{\rm z}^{\left( {\lambda _3 } \right)} $ \\ %\hline %13.3 & 0.0125 & -0.0049 & -0.0076 & 0.310 & 0.507 & 0.804 & 0.934 & -0.008 & -0.356 & 0.174 & -0.862 & 0.476 \\ %12.3 & 0.0058 & 0.0001 & -0.0060 & -0.266 & 0.411 & 0.872 & 0.944 & 0.292 & 0.151 & 0.192 & -0.864 & 0.465 \\ %11.0 & 0.0031 & 0.0008 & -0.0038 & 0.941 & 0.052 & -0.334 & 0.265 & 0.498 & 0.826 & 0.209 & -0.866 & 0.455 \\ %9.5 & 0.0030 & -0.0002 & {\it -0.0028} & 0.971 & 0.235 & -0.043 & -0.066 & 0.436 & 0.897 & {\it 0.230} & {\it -0.868} & {\it 0.439} \\ %7.9 & 0.0030 & -0.0006 & {\it -0.0024} & 0.954 & 0.297 & 0.026 & -0.146 & 0.390 & 0.909 & {\it 0.259} & {\it -0.871} & {\it 0.416} \\ %6.2 & 0.0030 & -0.0007 & {\it -0.0023} & 0.939 & 0.341 & 0.045 & -0.171 & 0.346 & 0.922 & {\it 0.299} & {\it -0.873} & {\it 0.384} \\ %4.6 & 0.0033 & -0.0008 & {\it -0.0024} & 0.919 & 0.391 & 0.050 & -0.175 & 0.292 & 0.940 & {\it 0.353} & {\it -0.873} & {\it 0.336} \\ %3.0 & 0.0037 & -0.0009 & {\it -0.0028} & 0.887 & 0.458 & 0.059 & -0.171 & 0.208 & 0.963 & {\it 0.429} & {\it -0.864} & {\it 0.263} \\ %1.4 & 0.0046 & -0.0010 & {\it -0.0036} & -0.829 & -0.551 & -0.097 & -0.158 & 0.065 & 0.985 & {\it 0.536} & {\it -0.832} & {\it 0.141}\\ %0.0 & 0.0065 & -0.0017 & {\it -0.0047} & -0.738 & -0.657 & -0.151 & -0.064 & -0.154 & 0.986 & {\it 0.671} & {\it -0.738} & {\it-0.071} \\ %\hline %\end{tabular}} %\label{Tabella04} %\end{table}