Contents

Lobachevskii Journal of Mathematics


Vol. 44, No. 4, 2023


On the Existence of Bound States of a System of Two Fermions on the Two-Dimensional Cubic Lattice

S. Kh. Abdukhakimov, S. N. Lakaev p. 1241  abstract

Geometry of Two-Dimensional Surfaces in Space ${}^{\mathbf{2}}{\boldsymbol{R}_{\mathbf{5}}}$

A. Artykbaev, B. M. Mamadaliyev p. 1251  abstract

Symmetries of the Black–Scholes–Merton Equation for European Options

L. N. Bakirova, M. A. Shurygina, V. V. Shurygin Jr. p. 1256  abstract

On Periodic Solutions for Some Nonlinear Fractional Pantograph Problems with $\boldsymbol{\Psi}$-Hilfer Derivative

Djilali Benzenati, Soufyane Bouriah, Abdelkrim Salim, Mouffak Benchohra p. 1264  abstract

On the Growth Order of Meromorphic Solutions of Some Ultrametric $\boldsymbol{q}$-Difference Equations

Houda Boughaba, Tahar Zerzaihi p. 1280  abstract

Asymptotics of the Exterior Conformal Modulus of a Symmetric Quadrilateral under Stretching Map

A. Dyutin, Giang V. Nguyen p. 1289  abstract

Uniform Approximation by Polynomial Solutions of Elliptic Systems on Boundaries of Carathéodory Domains in $\boldsymbol{\mathbb{R}}^{\mathbf{2}}$

K. Fedorovskiy p. 1299  abstract

Functional Equation Induced by a Half-Disk and Its Application

F. Garif’yanov, E. Strezhneva p. 1311  abstract

A Novel Iterative Scheme To Approximate the Fixed Points of Zamfirescu Operator and Generalized Non-Expansive Map with an Application

Pragati Gautam, Chanpreet Kaur p. 1316  abstract

A Semigroup $\boldsymbol{C^{*}}$-Algebra Related To the Infinite Dihedral Group

R. N. Gumerov, E. V. Lipacheva p. 1332  abstract

Gradient Estimations for Nonlinear Elliptic Equations on Weighted Riemannian Manifolds

Shyamal Kumar Hui, Abimbola Abolarinwa, Sujit Bhattacharyya p. 1341  abstract

Representations on an Open Set of Potentials that are Harmonic and Coincident Outside a Compact Subset

B. N. Khabibullin p. 1350  abstract

Interior Modulus of Polygonal Quadrilateral

I. A. Kolesnikov p. 1358  abstract

Puiseux Series Expansion for Eigenvalue of the Generalized Friedrichs Model with the Perturbation of Rank One

Sh. Kh. Kurbanov, S. T. Dustov p. 1365  abstract

On the Tubular Structure of Holomorphically Homogeneous Real Hypersurfaces in $\boldsymbol{\mathbb{C}}^{\mathbf{4}}$

A. V. Loboda p. 1373  abstract

On Orbits of 4-Dimensional Representations of 3-Dimensional Solvable Lie Algebras

A. V. Loboda, R. S. Akopyan, B. M. Darinskii p. 1383  abstract

Finite-Dimensional Dynamics in Nonlinear Heat Transfer

V. V. Lychagin p. 1407  abstract

Natural Differential Invariants and Equivalence of Third Order Nonlinear Differential Operators

V. V. Lychagin, V. A. Yumaguzhin p. 1416  abstract

On the Approximate Conformal Mapping of the Exterior of a Spiral Slit Onto the Exterior of a Horizontal Slit

Zhixin Lyu p. 1426  abstract

Compositions of Random Processes in a Hilbert Space and Its Limit Distribution

Yu. N. Orlov, V. Zh. Sakbaev, E. V. Shmidt p. 1432  abstract

One-Parameter Families of Conformal Mappings of the Half-Plane onto Polygonal Domains with Several Slits

A. Posadskii, S. Nasyrov p. 1448  abstract

Real-Analytic Continuation Along a Fixed Direction

A. Sadullaev, S. Imomkulov p. 1464  abstract

Discrete Dynamical Systems of Lotka–Volterra and Their Applications on the Modeling of the Biogen Cycle in Ecosystem

Sh. J. Seytov, D. B. Eshmamatova p. 1471  abstract

Equilibrium Droplet Shapes and Almost Global Semi-Geodesic Parametrization of Surfaces

E. A. Shcherbakov, M. E. Shcherbakov p. 1486  abstract

Holonomy Pseudogroups of Manifolds over Weil Algebras

V. V. Shurygin, S. K. Zubkova p. 1494  abstract

Polyorthogonalization in Pre-Hilbert Spaces

A. P. Starovoitov, E. P. Kechko p. 1506  abstract

Some Topological and Cardinal Properties of the $\boldsymbol{\lambda}_{\boldsymbol{\tau}}^{\boldsymbol{\varphi}}$-Nucleus of a Topological Space $\boldsymbol{X}$

T. K. Yuldashev, F. G. Mukhamadiev p. 1513  abstract

Conformal Anti-Invariant Riemannian Maps from or To Sasakian Manifolds

Adeeba Zaidi, Gauree Shanker, Ankit Yadav p. 1518  abstract

Erratum to: On the Number of Maximal Antichains in Boolean Lattices for $\boldsymbol{n}$ up to 7

D. I. Ignatov p. 1528  abstract