Totally Disconnected, Locally Compact Groups as Geometric Objects.- Computational Explorations in Thompson's Group F.- On the Surjunctivity of Artinian Linear Cellular Automata over Residually Finite Groups.- Some Residually Finite Groups Satisfying Laws.- Classifying Spaces for Wallpaper Groups.- A General Construction of JSJ Decompositions.- Décompositions de Groupes par Produit Direct et Groupes de Coxeter.- Limit Groups of Equationally Noetherian Groups.- Solution of the Conjugacy Problem and Malnormality of Subgroups in Certain Relative Small Cancellation Group Presentations.- Solution of the Membership Problem for Magnus Subgroups in Certain One-Relator Free Products.- Conjugacy and Centralizers for Iwip Automorphisms of Free Groups.- Algebraic Extensions in Free Groups.