This is pTeX, Version p3.0.1, based on TeX, Version 3.14159 (EUC) (Web2C 7.3.1) (format=platex 2002.3.30)  11 JAN 2004 17:13
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pLaTeX2e <2001/09/04>+0 (based on LaTeX2e <2000/06/01> patch level 0)
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Document Class: jarticle 2001/10/04 v1.3 Standard pLaTeX class
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File: jsize12.clo 2001/10/04 v1.3 Standard pLaTeX file (size option)
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! Missing $ inserted.
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l.13 ...{a_2\Sth_1}\Mqqb{0}{0}{1}{d_1}{0}{0}{0}{1}
                                                  a\nonumber\end{eqnarray}
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! Emergency stop.
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                $
l.13 ...{a_2\Sth_1}\Mqqb{0}{0}{1}{d_1}{0}{0}{0}{1}
                                                  a\nonumber\end{eqnarray}
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Here is how much of TeX's memory you used:
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