Contents

Theoretical and Mathematical Physics


Vol. 226, No. 2, 2026


Research Articles

Two-dimensional Riemann–Hilbert problem for commutative monodromy on an elliptic curve

A. M. Nefedova p. 177  abstract

Classical elliptic \({\rm BC}_1\) Ruijsenaars–van Diejen model: relation to Zhukovsky–Volterra gyrostat and 1-site classical \(XYZ\) model with boundaries

A. M. Mostovskii and A. V. Zotov p. 189  abstract

Effects of changing the multiplicity of terms in the Cauchy problem for the Dirac equation in graphene with a constant electric field and a localized initial condition

I. A. Bogaevskii, S. Yu. Dobrokhotov, and A. A. Tolchennikov p. 217  abstract

On the construction of integrable symplectic mappings

Xiao Yang, Mingyue Yu, and Dianlou Du p. 236  abstract

Different types of analytical solutions of the fifth-order KdV equation under the influence of Gaussian white noise and Brownian motion

Hai-Yan Wang, Ying Shi, Song-Lin Zhao, and Lu Yan p. 257  abstract

The three-component coupled time-varying coefficient complex mKdV equation via the \(\bar{\partial}\)-dressing method

Tao Deng, Qi Chen, and Chunxia Li p. 284  abstract

On the constructive solvability of a class of nonlinear multidimensional integral equations in the theory of \(p\)-adic strings

A. Kh. Khachatryan, Kh. A. Khachatryan, and H. S. Petrosyan p. 298  abstract

Global solvability, stability and oscillation criteria for systems of two first-order pseudo-linear ordinary differential equations

G. A. Grigorian p. 313  abstract

Evolution of flat perturbations in a cosmological environment of a scalar field with self-action and an ideal scalar-neutral fluid

Yu. G. Ignat’ev p. 338  abstract