Vol. 111, No. 2, 2025

Doklady Mathematics

On Some Class of Extreme Points of the Unit Ball of a Hardy–Lorentz Space

S. V. Astashkin p. 95 abstract

Ordinary Differential Equations of Even Order with Integral Conditions

R. A. Bayrash and A. L. Skubachevskii p. 99 abstract

Mathematics of Accelerated Expansion of the Universe and Lobachevsky Space

V. V. Vedenyapin p. 103 abstract

Unique Strong Solvability of the Initial Boundary Value Problem for Inhomogeneous Incompressible Kelvin–Voigt Fluid Model

V. G. Zvyagin and M. V. Turbin p. 110 abstract

Generalization of the Julia–Carathéodory Theorem to the Case of Several Boundary Fixed Points

O. S. Kudryavtseva p. 114 abstract

Topological Structure of the Solution Set of a Cauchy Problem for Fractional Differential Inclusions with an Upper Semicontinuous Right-Hand Side

G. G. Petrosyan p. 121 abstract

On a Combinatorial Application of Ultrafilter Theory: A New Construction of Triangle-Free Graphs with Arbitrarily Large Chromatic Number

N. L. Polyakov p. 126 abstract

Exact Solutions and Reductions of the Nonlinear Schrödinger Equation of General Form

A. D. Polyanin and N. A. Kudryashov p. 134 abstract

Problems and Methods of the Theory Functional Differential Equations with Discontinuous Right Hand Side

I. A. Finogenko p. 138 abstract

Notes on the Recurrence of Birkhoff Sums

N. V. Denisova p. 144 abstract

The DipolarCalc Software System for Assessing the Polarization of Biological Molecular Structures

I. K. Il’in, Yu. A. Uss, M. V. Shamolin, and L. A. Yan’ko p. 147 abstract

Differentiation, Efficiency, and Inflation in Economic Theory

B. I. Nigmatulin and Academician of the RAS R. I. Nigmatulin p. 151 abstract