This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012) (format=pdflatex 2014.12.30) 20 APR 2015 17:26 entering extended mode \write18 enabled. %&-line parsing enabled. **VL1_functions_and_control_structures3.tex (./VL1_functions_and_control_structures3.tex LaTeX2e <2011/06/27> Babel and hyphenation patterns for english, dumylang, nohyphenation, uk english, usenglishmax, german-x-2012-05-30, ngerman-x-2012-05-30, german, ngerm an, swissgerman, loaded. ! LaTeX Error: Missing \begin{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.1 H ow about \emph{recursion}? Let's define the modulo of any \emph{Int} to... You're in trouble here. Try typing to proceed. If that doesn't work, type X to quit. Missing character: There is no H in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no w in font nullfont! Missing character: There is no a in font nullfont! Missing character: There is no b in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no u in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no ? in font nullfont! Missing character: There is no L in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no ' in font nullfont! Missing character: There is no s in font nullfont! Missing character: There is no d in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no f in font nullfont! Missing character: There is no i in font nullfont! Missing character: There is no n in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no h in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no m in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no d in font nullfont! Missing character: There is no u in font nullfont! Missing character: There is no l in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no f in font nullfont! Missing character: There is no a in font nullfont! Missing character: There is no n in font nullfont! Missing character: There is no y in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no . in font nullfont! ! Undefined control sequence. l.2 \pause The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. ! LaTeX Error: Environment haskellcode undefined. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.4 \begin{haskellcode} Your command was ignored. Type I to replace it with another command, or to continue without it. Missing character: There is no m in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no d in font nullfont! Missing character: There is no 2 in font nullfont! Missing character: There is no : in font nullfont! Missing character: There is no : in font nullfont! Missing character: There is no I in font nullfont! Missing character: There is no n in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no - in font nullfont! Missing character: There is no > in font nullfont! Missing character: There is no I in font nullfont! Missing character: There is no n in font nullfont! 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Missing character: There is no ( in font nullfont! Missing character: There is no x in font nullfont! Missing character: There is no - in font nullfont! Missing character: There is no 2 in font nullfont! Missing character: There is no ) in font nullfont! ! LaTeX Error: \begin{document} ended by \end{haskellcode}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.10 \end{haskellcode} Your command was ignored. Type I to replace it with another command, or to continue without it. Missing character: There is no T in font nullfont! Missing character: There is no h in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no s in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no h in font nullfont! Missing character: There is no i in font nullfont! Missing character: There is no n in font nullfont! 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Missing character: There is no d in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no f in font nullfont! Missing character: There is no i in font nullfont! Missing character: There is no n in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no d in font nullfont! Missing character: There is no a in font nullfont! Missing character: There is no s in font nullfont! ! Undefined control sequence. l.11 ... on the last line is just defined as \code {True}, to make these cons... The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. Missing character: There is no T in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no u in font nullfont! 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Missing character: There is no f in font nullfont! Missing character: There is no i in font nullfont! Missing character: There is no n in font nullfont! Missing character: There is no p in font nullfont! Missing character: There is no u in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no . in font nullfont! ) ! Emergency stop. <*> VL1_functions_and_control_structures3.tex *** (job aborted, no legal \end found) Here is how much of TeX's memory you used: 15 strings out of 494970 342 string characters out of 3179589 45290 words of memory out of 3000000 3318 multiletter control sequences out of 15000+200000 4462 words of font info for 17 fonts, out of 3000000 for 9000 36 hyphenation exceptions out of 8191 17i,1n,14p,501b,123s stack positions out of 5000i,500n,10000p,200000b,50000s ! ==> Fatal error occurred, no output PDF file produced!