This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012) (format=pdflatex 2012.6.30) 15 OCT 2012 10:52 entering extended mode restricted \write18 enabled. file:line:error style messages enabled. %&-line parsing enabled. **2.2.beilinson-flach.tex (./2.2.beilinson-flach.tex LaTeX2e <2011/06/27> Babel and hyphenation patterns for english, dumylang, nohyphenation, ge rman-x-2012-05-30, ngerman-x-2012-05-30, afrikaans, ancientgreek, ibycus, arabi c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis h, french, friulan, galician, german, ngerman, swissgerman, monogreek, greek, h ungarian, icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, ma rathi, oriya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, kurmanji, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk, polish, portuguese, romanian, romansh, russian, sanskrit, serbian, serbianc, s lovak, slovenian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, welsh, loaded. ./2.2.beilinson-flach.tex:5: Undefined control sequence. l.5 \subsection {Beilinson-Flach elements} ? x Here is how much of TeX's memory you used: 5 strings out of 493488 174 string characters out of 3141326 49432 words of memory out of 3000000 3412 multiletter control sequences out of 15000+200000 3640 words of font info for 14 fonts, out of 3000000 for 9000 957 hyphenation exceptions out of 8191 5i,0n,1p,66b,8s stack positions out of 5000i,500n,10000p,200000b,50000s No pages of output. PDF statistics: 0 PDF objects out of 1000 (max. 8388607) 0 named destinations out of 1000 (max. 500000) 1 words of extra memory for PDF output out of 10000 (max. 10000000)