1. Weak condition for a class of \(p\)-Laplacian Hamiltonian systems

   • A. Benhassine

   Research Articles 16 July 2021 Pages: 855 - 864

2. Kadomtsev–Petviashvili hierarchies of types B and C

   • A. V. Zabrodin

   Research Articles 16 July 2021 Pages: 865 - 885

3. Integrable symplectic maps via reduction of Bäcklund transformation

   • Dianlou Du
   • Yuanyuan Liu
   • Xue Wang

   Research Articles 16 July 2021 Pages: 886 - 895

4. \(q\)-Universal characters and an extension of the lattice \(q\)-universal characters

   • Yang Gao
   • Chuanzhong Li

   Research Articles 16 July 2021 Pages: 896 - 911

5. On the absence of global periodic solutions of a Schrödinger-type nonlinear evolution equation

   • Sh. M. Nasibov

   Research Articles 16 July 2021 Pages: 912 - 915

6. Spin nonclassicality via variance

   • Yue Zhang
   • Shunlong Luo

   Research Articles 16 July 2021 Pages: 916 - 925

7. Increase in entropy and time irreversibility in Hamiltonian dynamics

   • V. P. Pavlov
   • V. M. Sergeev
   • R. V. Shamin

   Research Articles 16 July 2021 Pages: 926 - 936

   

8. The law of large numbers for quantum stochastic filtering and control of many-particle systems

   • V. N. Kolokoltsov

   Research Articles 16 July 2021 Pages: 937 - 957

9. Vacuum charge and current densities in the supercritical two-dimensional Dirac–Coulomb system in a magnetic field with an axial-vector potential

   • A. S. Davydov
   • A. A. Krasnov
   • V. A. Kuz’min

   Research Articles 16 July 2021 Pages: 958 - 976

   

10. Behavior of Andreev states for topological phase transition

    • Yu. P. Chuburin
    • T. S. Tinyukova

    Research Articles 16 July 2021 Pages: 977 - 992