1. Projectors on invariant subspaces of representations \(\mathrm{ad}^{\otimes2}\) of Lie algebras \(so(N)\) and \(sp(2r)\) and Vogel parameterization

   • A. P. Isaev
   • A. A. Provorov

   Research Articles 21 June 2021 Pages: 1 - 18

2. Algebraic Bethe ansatz for \(\mathfrak o_{2n+1}\)-invariant integrable models

   • A. Liashyk
   • S. Z. Pakuliak

   Research Articles 21 June 2021 Pages: 19 - 39

3. Pure soliton solutions of the nonlocal Kundu–nonlinear Schrödinger equation

   • Xiu-Bin Wang
   • Bo Han

   Research Articles 21 June 2021 Pages: 40 - 67

   

4. Weak asymptotics of the wave function for an \(N\)-particle system and asymptotic filtration

   • S. L. Yakovlev

   Research Articles 21 June 2021 Pages: 68 - 83

5. Exponentially confining potential well

   • A. D. Alhaidari

   Research Articles 21 June 2021 Pages: 84 - 96

   

6. Extremality of the unique translation-invariant Gibbs measure for hard-core models on the Cayley tree of order \(k=3\)

   • R. M. Khakimov
   • K. O. Umirzakova

   Research Articles 21 June 2021 Pages: 97 - 108

   

7. Study of cylindrically symmetric solutions in an \(f(R)\) gravity background

   • M. A. Farooq
   • M. F. Shamir

   Research Articles 21 June 2021 Pages: 109 - 118