La génération automatique d'affiche a rencontré un problème:
This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
 %&-line parsing enabled.
entering extended mode
(/tmp/poster.tex
LaTeX2e <2005/12/01>
Babel  and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, arabic, basque, bulgarian, coptic, welsh, czech, slovak, german, ng
erman, danish, esperanto, spanish, catalan, galician, estonian, farsi, finnish,
 french, greek, monogreek, ancientgreek, croatian, hungarian, interlingua, ibyc
us, indonesian, icelandic, italian, latin, mongolian, dutch, norsk, polish, por
tuguese, pinyin, romanian, russian, slovenian, uppersorbian, serbian, swedish, 
turkish, ukenglish, ukrainian, loaded.
(/usr/share/texmf/tex/latex/base/article.cls
Document Class: article 2005/09/16 v1.4f Standard LaTeX document class
(/usr/share/texmf/tex/latex/base/size11.clo))
(/usr/share/texmf/tex/latex/base/inputenc.sty
(/usr/share/texmf/tex/latex/base/latin1.def))
(/usr/share/texmf/tex/generic/babel/babel.sty
(/usr/share/texmf/tex/generic/babel/frenchb.ldf
(/usr/share/texmf/tex/generic/babel/babel.def)
*************************************
* Local config file frenchb.cfg used
*
(/usr/share/texmf/tex/generic/babel/frenchb.cfg))) (./poster.aux)
(/usr/share/texmf/tex/latex/lm/t1lmr.fd)
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\smallheadfont LKB, Vi-sio-conf^^Serence Zoom( Lien zoom : https ://us02web.zoo
m.us/j/81651124927?

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! Package inputenc Error: Keyboard character used is undefined
(inputenc)                in inputencoding `latin1'.

See the inputenc package documentation for explanation.
Type  H   for immediate help.
 ...                                              
                                                  
l.142 Titre: {\it De l’
                       impossibilité de calculer algébriquement la position ...

? 
! Emergency stop.
 ...                                              
                                                  
l.142 Titre: {\it De l’
                       impossibilité de calculer algébriquement la position ...

Output written on poster.dvi (2 pages, 4408 bytes).
Transcript written on poster.log.

Si vous en avez la possibilité, merci de bien vouloir corriger les informations erronées.