1. Binary relations, Bäcklund transformations, and wave packet propagation

   • V. V. Zharinov

   Research Articles 26 October 2020 Pages: 1245 - 1263

2. Modified series of integrable discrete equations on a quadratic lattice with a nonstandard symmetry structure

   • R. N. Garifullin
   • R. I. Yamilov

   Research Articles 26 October 2020 Pages: 1264 - 1278

3. Dispersionless integrable systems and the Bogomolny equations on an Einstein–Weyl geometry background

   • L. V. Bogdanov

   Research Articles 26 October 2020 Pages: 1279 - 1290

4. Integrable system of generalized relativistic interacting tops

   • I. A. Sechin
   • A. V. Zotov

   Research Articles 26 October 2020 Pages: 1291 - 1302

5. Two-component generalized Ragnisco–Tu equation and the Riemann–Hilbert problem

   • L. L. Wang
   • C. Song
   • J. Zhu

   Research Articles 26 October 2020 Pages: 1303 - 1317

   

6. Nonlinear radion interactions

   • I. P. Volobuev
   • S. I. Keizerov
   • E. R. Rakhmetov

   Research Articles 26 October 2020 Pages: 1318 - 1332

7. Virasoro symmetries of multicomponent Gelfand–Dickey systems

   • L. An
   • Ch. Li

   Research Articles 26 October 2020 Pages: 1333 - 1352

8. Construction of an equivalent energy-dependent potential by a Taylor series expansion

   • A. K. Behera
   • B. Khirali
   • J. Bhoi

   Research Articles 26 October 2020 Pages: 1353 - 1363

   

9. Self-consistent approximation in the Ising model of pure and dilute magnets using a pair correlation

   • S. V. Semkin
   • V. P. Smagin
   • P. V. Yudin

   Research Articles 26 October 2020 Pages: 1364 - 1371

   

10. Phase transitions for models with a continuum set of spin values on a Bethe lattice

    • Yu. Kh. Eshkabilov
    • G. I. Botirov
    • F. Kh. Khaidarov

    Research Articles 26 October 2020 Pages: 1372 - 1380

11. Construction of the Dirac operator on the \(q\)-deformed quantum space \(EAdS^2\) using a generalized \(q\)-deformed Ginsparg–Wilson algebra

    • M. Lotfizadeh
    • R. Feyzi

    Research Articles 26 October 2020 Pages: 1381 - 1390

12. Erratum to: Series solution of a ten-parameter second-order differential equation with three regular singularities and one irregular singularity

    • A. D. Alhaidari

    Research Articles 26 October 2020 Pages: 1391 - 1391