Contents

Russian Mathematics

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Vol. 68, No. 11, 2024

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Isochronous Centers and Foci of Two-Dimensional Holomorphic Differential Systems

V. V. Amel’kin, and V. Yu. Tyshchenko p. 1  abstract

Schwarz and Dirichlet Problems for \(\bar {\partial }\)-Equation in a Triangular Domain

A. Darya, and N. Taghizadeh p. 9  abstract

On the Riesz Inequality and the Basicity of Systems of Root Vector Functions of 2mth-Order Dirac-Type Operator with Summable Coefficient

E. J. Ibadov p. 18  abstract

Weighted Sobolev Orthogonal Systems with Two Discrete Points and Fourier Series with Respect to Them

M. G. Magomed-Kasumov p. 29  abstract

A Note on Visser’s Inequality

M. Shafi, N. A. Rather, and S. Gulzar p. 44  abstract

Jordan Test for the Haar-Type Systems

V. I. Shcherbakov p. 53  abstract

The Shortest Polygonal Chains in the Heisenberg Group

S. G. Basalaev p. 71  abstract

Two Variants of Stating Problems of Mechanics of a Strip with a Section of One-Sided Fixing of Finite Length on a Rigid Support Element

V. N. Paimushin p. 77  abstract

Generalizations of Sobolev Classes to the Metric and Topological Cases

N. N. Romanovsky p. 84  abstract

The Second-Kind Involutions of Upper Triangular Matrix Algebras

D. T. Tapkin p. 91  abstract

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