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diff --git a/slides/preplogic-slides.log b/slides/preplogic-slides.log
index cdb8be9..678d909 100644
--- a/slides/preplogic-slides.log
+++ b/slides/preplogic-slides.log
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diff --git a/slides/preplogic-slides.pdf b/slides/preplogic-slides.pdf
index 0e1ab91..4a88f12 100644
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index 94a4895..3601d27 100644
--- a/slides/preplogic-slides.tex
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@@ -11,7 +11,7 @@
 %\setbeamertemplate{navigation symbols}{} 
 \logo{\includegraphics[scale=0.065]{unilu.jpg}} 
 \institute{uni.lu} 
-\date{September 7-8, 2020} 
+\date{September 13-14, 2021} 
 %\subject{}
 
 \newtheorem {proposition}{Proposition}