Boris A. Khesin, University of Toronto, Ontario, Canada.Serge L. Tabachnikov, ICERM, Brown University, Providence, RI, USA and Pennsylvania State University, State College, PA, USA.

• Epigraph by B. A. Khesin and S. L. TabachnikovBy Arnold: Arnold in his own words by V. I. ArnoldFrom Hilbert's superposition problem to dynamical systems by V. I. ArnoldRecollections by J. MoserPolymathematics: Is mathematics a single science or a set of arts? by V. I. ArnoldA mathematical trivium by V. I. ArnoldComments on A Mathematical Trivium by B. A. Khesin and S. L. TabachnikovAbout Vladimir Abramovich Rokhlin by V. I. ArnoldAbout Arnold: To whom it may concern by A. GiventalRemembering Vladimir Arnold: Early years by Y. SinaiVladimir I. Arnold by S. SmaleMemories of Vladimir Arnold by M. Berry DimaArnold in my life by D. FuchsV. I. Arnold, as I have seen him by Y. IlyashenkoMy encounters with Vladimir Igorevich Arnold by Y. EliashbergOn V. I. Arnold and hydrodynamics by B. A. KhesinArnold's seminar, first years by A. Khovanskii and A. VarchenkoTopology in Arnold's work by V. VassilievArnold and symplectic geometry by H. HoferSome recollections of Vladimir Igorevich by M. SevryukRemembering V. I. Arnold by L. PolterovichSeveral thoughts about Arnold by A. VershikVladimir Igorevich Arnold: A view from the rear bench by S. Yakovenko