This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) (preloaded format=pdflatex 2017.12.4) 16 DEC 2017 22:44 entering extended mode restricted \write18 enabled. %&-line parsing enabled. **ts-complexes-19.tex (./ts-complexes-19.tex LaTeX2e <2016/02/01> Babel <3.9q> and hyphenation patterns for 81 language(s) loaded. ! Undefined control sequence. l.1 \exercice [style=R,N=2,verif]{$\i$ exposant $\i$} 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: Missing \begin{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.1 \exercice[ style=R,N=2,verif]{$\i$ exposant $\i$} You're in trouble here. Try typing to proceed. If that doesn't work, type X to quit. Missing character: There is no [ in font nullfont! Missing character: There is no s in font nullfont! Missing character: There is no t in font nullfont! Missing character: There is no y 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 = in font nullfont! Missing character: There is no R in font nullfont! Missing character: There is no , in font nullfont! Missing character: There is no N 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! Missing character: There is no v in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no i in font nullfont! Missing character: There is no f in font nullfont! Missing character: There is no ] in font nullfont! LaTeX Font Info: External font `cmex10' loaded for size (Font) <7> on input line 1. LaTeX Font Info: External font `cmex10' loaded for size (Font) <5> on input line 1. LaTeX Warning: Command \i invalid in math mode on input line 1. LaTeX Warning: Command \i invalid in math mode on input line 1. Missing character: There is no e in font nullfont! Missing character: There is no x in font nullfont! Missing character: There is no p in font nullfont! Missing character: There is no o in font nullfont! Missing character: There is no s 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 t in font nullfont! LaTeX Warning: Command \i invalid in math mode on input line 1. LaTeX Warning: Command \i invalid in math mode on input line 1. Overfull \hbox (22.77779pt too wide) in paragraph at lines 1--2 []$\OT1/cmr/m/n/10 ^^P$ [] Overfull \hbox (2.77779pt too wide) in paragraph at lines 1--2 \OT1/cmr/m/n/10 ^^P$ [] ! LaTeX Error: Missing \begin{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.3 M ontrer que $\i^\i\in\R$. You're in trouble here. Try typing to proceed. If that doesn't work, type X to quit. Missing character: There is no M in font nullfont! Missing character: There is no o 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 r in font nullfont! Missing character: There is no e in font nullfont! Missing character: There is no r in font nullfont! Missing character: There is no q in font nullfont! Missing character: There is no u in font nullfont! Missing character: There is no e in font nullfont! LaTeX Warning: Command \i invalid in math mode on input line 3. LaTeX Warning: Command \i invalid in math mode on input line 3. ! Missing { inserted. \begingroup l.3 Montrer que $\i^\i \in\R$. A left brace was mandatory here, so I've put one in. You might want to delete and/or insert some corrections so that I will find a matching right brace soon. (If you're confused by all this, try typing `I}' now.) LaTeX Warning: Command \i invalid in math mode on input line 3. LaTeX Warning: Command \i invalid in math mode on input line 3. ! Undefined control sequence. l.3 Montrer que $\i^\i\in\R $. 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 } inserted. } l.3 Montrer que $\i^\i\in\R$ . I've inserted something that you may have forgotten. (See the above.) With luck, this will get me unwedged. But if you really didn't forget anything, try typing `2' now; then my insertion and my current dilemma will both disappear. Missing character: There is no . in font nullfont! ) ! Emergency stop. <*> ts-complexes-19.tex *** (job aborted, no legal \end found) Here is how much of TeX's memory you used: 9 strings out of 493029 200 string characters out of 6136234 53072 words of memory out of 5000000 3645 multiletter control sequences out of 15000+600000 3640 words of font info for 14 fonts, out of 8000000 for 9000 1141 hyphenation exceptions out of 8191 18i,3n,12p,86b,58s stack positions out of 5000i,500n,10000p,200000b,80000s ! ==> Fatal error occurred, no output PDF file produced!