first and last chapters

tex/ch0.tex

@@ -42,15 +42,16 @@ \chapter*{Introduction}
 infinitude of prime numbers, or the correctness of the Euclidean's
 division algorithm, in a few lines of proof text.
 
-\paragraph{Acknowledgments.} The authors wish to thank Reynald
-Affeldt, Guillaume Allais, Sophie Bernard, Simon Boulier, Cyril Cohen,
-Arthur Charguéraud, Alain Giorgetti, Darij Grinberg, Florent Hivert,
-Pierre Jouvelot, Marisa Kirisame, Guillaume Melquiond, Sebastian
-Miele, Yamamoto Mitsuharu, Prashanth Mundkur, Michael Nahas, Julien
-Narboux, Laurence Rideau, Lionel Rieg, Damien Rouhling, Michael
-Soegtrop, Laurent Théry, and Anton Trunov for their careful
-proofreading and for their suggestions. Many thanks to Hanna for the
-illustrations.
+\paragraph{Acknowledgments.}
+We thank Yves Bertot and Georges Gonthier, for contributing the first
+and the last chapter of this book. We wish to thank Reynald Affeldt,
+Guillaume Allais, Sophie Bernard, Simon Boulier, Cyril Cohen, Arthur
+Charguéraud, Alain Giorgetti, Darij Grinberg, Florent Hivert, Pierre
+Jouvelot, Marisa Kirisame, Guillaume Melquiond, Sebastian Miele,
+Yamamoto Mitsuharu, Prashanth Mundkur, Michael Nahas, Julien Narboux,
+Laurence Rideau, Lionel Rieg, Damien Rouhling, Michael Soegtrop,
+Laurent Théry, and Anton Trunov for their careful proofreading and for
+their suggestions. Many thanks to Hanna for the illustrations.
 
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 \section*{Structure of the book}