This is pdfTeXk, Version 3.1415926-1.40.9 (Web2C 7.5.7) (format=pdflatex 2009.8.20) 17 MAY 2010 08:23 entering extended mode \write18 enabled. %&-line parsing enabled. **equivalences.tex (./equivalences.tex LaTeX2e <2005/12/01> Babel and hyphenation patterns for english, usenglishmax, dumylang, noh yphenation, german-x-2008-06-18, ngerman-x-2008-06-18, ancientgreek, ibycus, ar abic, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danish, dutc h, esperanto, estonian, farsi, finnish, french, galician, german, ngerman, mono greek, greek, hungarian, icelandic, indonesian, interlingua, irish, italian, la tin, lithuanian, mongolian, mongolian2a, bokmal, nynorsk, polish, portuguese, r omanian, russian, sanskrit, serbian, slovak, slovenian, spanish, swedish, turki sh, ukenglish, ukrainian, uppersorbian, welsh, loaded. ! Undefined control sequence. l.1 \section {Safe equivalences}\label{sec:equivalences} ? ! Emergency stop. l.1 \section {Safe equivalences}\label{sec:equivalences} End of file on the terminal! Here is how much of TeX's memory you used: 5 strings out of 493876 143 string characters out of 1150568 48901 words of memory out of 3000000 3379 multiletter control sequences out of 10000+50000 3640 words of font info for 14 fonts, out of 3000000 for 5000 714 hyphenation exceptions out of 8191 5i,0n,1p,70b,8s stack positions out of 5000i,500n,10000p,200000b,50000s ! ==> Fatal error occurred, no output PDF file produced!