Includes bibliographical references.

Tores affines ; On structures preserved by idempotent transformations of groups and homotopy types ; Affine Schottky groups and crooked tilings ; Polynomial structures on polycyclic groups: recent developments ; Problems on the geometry of finitely generated solvable groups ; Flat Lorentz 3manifolds and cocompact Fuchsian groups ; Varieties of discontinuous groups ; Affine cohomology classes for filiform Lie algebras ; Hyperbolic automorphisms for groups in scr T(4,2) ; Varietes projectives a holonomie dans le groupe rm Aff^+(\mathrm R) ; Classification of homogeneous complex affinely flat surfaces with compact quotients and applications to complex projective structures ; On the fundamental groups of compact complete quaternionic affinely flat 2manifolds ; An obstruction to the existence of Anosov diffeomorphisms on infranilmanifolds ; Genus and localization of virtually nilpotent groups ; Immeubles affines: construction par les normes et etude des isometries ; Isoclinic spheres and flat homogeneous pseudoRiemannian manifolds Yves Benoist ; Carles Casacuberta ; Virginie Charette and William M Goldman ; Karel Dekimpe ; Benson Farb and Lee Mosher ; William M Goldman and Gregory A Margulis ; Oliver Baues ; Dietrich Burde ; Charles Cassidy Neil Kennedy and Dirk Scevenels ; Serge Dupont ; Yoshinobu Kamishima ; Yoshinobu Kamishima and Tetsuro Udono ; Wim Malfait ; Niamh O'Sullivan ; Anne Parreau ; Joseph A Wolf