1. V. Arnold on the 80th anniversary

   Announcement 09 December 2017 Pages: 579 - 584

2. Contact orderability up to conjugation

   • Kai Cieliebak
   • Yakov Eliashberg
   • Leonid Polterovich

   OriginalPaper 09 December 2017 Pages: 585 - 602

3. Families of invariant tori in KAM theory: Interplay of integer characteristics

   • Mikhail B. Sevryuk

   OriginalPaper 09 December 2017 Pages: 603 - 615

4. Normalization in Lie algebras via mould calculus and applications

   • Thierry Paul
   • David Sauzin

   OriginalPaper 09 December 2017 Pages: 616 - 649

5. Simple proofs and extensions of a result of L. D. Pustylnikov on the nonautonomous Siegel theorem

   • Rafael de la Llave

   OriginalPaper 09 December 2017 Pages: 650 - 676

6. Are nonsymmetric balanced configurations of four equal masses virtual or real?

   • Alain Chenciner

   OriginalPaper 09 December 2017 Pages: 677 - 687

7. The hyperbolic plane, three-body problems, and Mnëv’s universality theorem

   • Richard Montgomery

   OriginalPaper 09 December 2017 Pages: 688 - 699

8. Diffusion and drift in volume-preserving maps

   • Nathan Guillery
   • James D. Meiss

   OriginalPaper 09 December 2017 Pages: 700 - 720

9. Integrable deformations of the Bogoyavlenskij–Itoh Lotka–Volterra systems

   • C.A. Evripidou
   • P. Kassotakis
   • P. Vanhaecke

   OriginalPaper 09 December 2017 Pages: 721 - 739

10. Sigma map dynamics and bifurcations

    • Aminur Rahman
    • Yogesh Joshi
    • Denis Blackmore

    OriginalPaper 09 December 2017 Pages: 740 - 749

11. Symplectic geometry of constrained optimization

    • Andrey A. Agrachev
    • Ivan Yu. Beschastnyi

    OriginalPaper 09 December 2017 Pages: 750 - 770