This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011) restricted \write18 enabled. entering extended mode (./protect.tex LaTeX2e <2011/06/27> Babel and hyphenation patterns for english, dumylang, nohyphenation, ge rman-x-2011-07-01, ngerman-x-2011-07-01, 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, galician, german, ngerman, swissgerman, monogreek, greek, hungarian, icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, marathi, or iya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, kurmanji, lao, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk, pol ish, portuguese, romanian, russian, sanskrit, serbian, serbianc, slovak, sloven ian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, welsh, loaded . (/usr/local/texlive/2011/texmf-dist/tex/latex/base/article.cls Document Class: article 2007/10/19 v1.4h Standard LaTeX document class (/usr/local/texlive/2011/texmf-dist/tex/latex/base/size10.clo)) (./protect.aux) (./protect.toc ! LaTeX Error: Bad math environment delimiter. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.1 ...k or to continue without it.} }{1} ? ! Missing $ inserted. $ l.1 ...k or to continue without it.} }{1} ? ) [1{/usr/local/texlive/2011/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] (./protect.aux) ) Output written on protect.pdf (1 page, 56532 bytes). Transcript written on protect.log.