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\begin{table}  \caption{\label{arxivabbrv} \caption{Table 2.  List of abbreviations for arXiv.org subject domains} \begin{tabular}{ll}  {\bf  Subject Abbr. Abbr.}  & {\bf  Description \\ }\\  astro-ph &Astrophysics \\  hep &High Energy Physics \\  physics &Physics \\