xii Preface
• Daniel Bennequin, Université Paris 7, UFR de Mathématiques, 1 75 rue du Chevaleret,
75013 Paris, Fr ance. bennequin@math.jussieu.fr
and in particular for contributions throughout this work,
• Brigitte Le Roux, MAP5 Université Paris Descartes, 45 rue des Saints Pères, 75 006
Paris, France, & CEVIPOF/CNRS, 98 rue de l’Université, 75007, Paris, France.
Brigitte.LeRoux@mi.parisdescartes.fr
Finally, special acknowledgments are noted by Mireille Gettler Summa and Myriam
Touati to their respective spouses and children, Pierangelo and Robin Summa, Joë l and
Sarah Touati, for their patience and their support throughout the editing process of this
book.