Contents

Lobachevskii Journal of Mathematics


Vol. 47, No. 4, 2026


The Log-OGNak-Weibull Regression Model: A Flexible Parameterization for Survival Analysis with Application to HIV Data

Ibrahim Abdullahi and Wikanda Phaphan p. 1415  abstract

Systems of Evolution Equations with GPCA and Impulsive Multipoint Constraints

A. D. Abildayeva, A. T. Assanova, A. E. Imanchiyev, and S. G. Karakenova p. 1424  abstract

Modeling of Non-Invasive Glucose Monitoring in Diabetes

M. I. Akylbayev, U. O. Turapov, and M. T. Shomanbayeva p. 1437  abstract

Analytical and Computational Aspects of Investigating Conjugation Problems for Linear Third-Order Pseudoparabolic Equations

Nurkasym Arkabaev, Roza Oichueva, Tynybek Naraliev, and Kymbat Matkalyk kyzy p. 1448  abstract

Properties of Biharmonic Functions of a Particular Class

Z. R. Ashurova, U. Yu. Juraeva, and F. U. Mallaeva p. 1462  abstract

Ad-Hoc Networks Routing Protocols Resource Efficiency Assessment

A. Barinov and A. Klimenko p. 1481  abstract

Linear Inverse Problem for a Three-Dimensional Fourth-Order Mixed-Type Equation of the Second Kind with Semi-Nonlocal Boundary Conditions in a Parallelepiped

S. Z. Dzhamalov and B. B. Khalkhadzhaev p. 1495  abstract

Problem with Combined Local and Nonlocal Conditions on One Boundary Characteristic for One Class of Equations of Mixed Type

S. B. Ergasheva, U. M. Mirsaburova, and B. B. Amonov p. 1508  abstract

Characterizing Cocircuits in Splitting Matroids Representable over Prime Field \(\boldsymbol{GF(p)}\)

Sachin Gunjal and Prashant Malavadkar p. 1520  abstract

Qualitative Investigation of Generalized Caputo-fractional IDE with Its Applications in Fractional-RLC Circuits

Damini Gupta, Mausumi Sen, Raj Kumar Biswas, and Bapan Ali Miah p. 1531  abstract

Explicit Large-Deviation Error Bounds in the Infinite-mean \(\boldsymbol{\alpha=1}\) Domain via Characteristic-Function Inversion

Jonny Imbierski and Dalia Terhesiu p. 1546  abstract

On Demi Uaw-Dunford–Pettis Operators

Z. Jbeli p. 1562  abstract

Quasivarieties Generated by Small Suborder Lattices. II. Dualities

O. A. Kadyrova and M. V. Schwidefsky p. 1572  abstract

Weak Jumps in the Elementary Degrees and Jump Inversion Theorems

I. Sh. Kalimullin p. 1590  abstract

Data Augmentation Procedure for Improving Efficiency of Anomaly Detection Models in a Multidimensional Stochastic Process with Continuous Time

I. A. Kareev p. 1598  abstract

On Matrix Mask Function and Second Companion Matrix

Balu P. Kartha and M. C. Lineesh p. 1608  abstract

On a Certain Nonlinear Multidimensional Integral Equation Arising in Mathematical Epidemiology

Khachatur A. Khachatryan, Anna B. Avanyan, and Gagik A. Melkumyan p. 1621  abstract

On the Solvability of a Nonlocal Problem for a Boussinesq Type Inhomogeneous Differential Equation

A. R. Khalmukhamedov and E. I. Kuchkorov p. 1632  abstract

Mathematical Modeling of Filtration and Rheological Relations for Saturated Porous Media with Porous Skeleton of Changeable Mass

M. G. Khramchenkov p. 1641  abstract

Method for Constructing the Asymptotics of Solutions of Differential Equations in the Neighborhood of Irregular Singular Points

M. V. Korovina p. 1648  abstract

Strongly Minimal Partial Orderings Having an Infinite Non-trivial Width

B. Sh. Kulpeshov and Ye. K. Netaliyeva p. 1660  abstract

Pseudo-Uncountably-Categorical Structures and Theories

B. Sh. Kulpeshov, In. I. Pavlyuk, and S. V. Sudoplatov p. 1668  abstract

Factorial-Decay Lag Adaptive LASSO in High-Dimensional ADL Models

Nantawat Maha, Manad Khamkong, Arief Gusnanto, Nawapon Nakharutai, and Pimwarat Srikummoon p. 1683  abstract

On Structured Solutions of the Matrix Diophantine Equation \(\boldsymbol{X^{3}+Y^{3}=2Z^{3}}\)

Priyaranjan Mallick and Debasisha Mishra p. 1697  abstract

Analytical and Numerical Analysis of Nonlinear Volterra–Fredholm Fractional Integro-Differential Equations via Haar Wavelets

Bapan Ali Miah, Mausumi Sen, and R. Murugan p. 1713  abstract

Explicit Formulas for PLIC Interface Reconstruction on a Compact Stencil

R. V. Muratov, A. A. Serezhkin, and I. S. Menshov p. 1726  abstract

General Solutions of Linear Impulsive Fredholm Integro-Differential Equations in the Sense of Dzhumabaev

S. T. Mynbayeva and A. K. Tankeyeva p. 1741  abstract

Two Layered Hidden Markov Model with Markovian Emission States for Studying Type 2 Diabetes

Surnam Narendra and Tirupathi Rao Padi p. 1753  abstract

Solutions for the Critical \(\boldsymbol{p}\)-Kirchhoff System with the \(\boldsymbol{\psi}\)-Hilfer Fractional Derivative

Nemat Nyamoradi and J. Vanterler da C. Sousa p. 1766  abstract

Exploring the Impact of Multivariate Imputation Techniques on the Performance of Classification Models

Ratchaneewan Paisanwarakiat, Anamai Na-udom, and Jaratsri Rungrattanaubol p. 1783  abstract

Bohr Radii in New Geometric Settings of Analytic Functions

Vijayakumar Ramakrishnan, Brindha Valson E, and Ribin Christal Robi p. 1795  abstract

On the Solvability of the Regularized Saturated Filtration Consolidation Problem with a Limiting Gradient

E. V. Rung and K. N. Stekhina p. 1806  abstract

Modified Goodness-of-Fit Tests for the Weibull–Pareto Distribution with Applications in Reliability and Survival Analysis

N. Saaidia and H. Zeghdoudi p. 1816  abstract

Density Matrix of Bipartite Fermi Systems in the Framework of Local CAR-Algebras

A. S. Sitdikov, A. S. Nikitin, and D. V. Bushtets p. 1829  abstract

Regime-Switching Random Environment INAR(1) Model with Modified Negative Binomial Thinning and Innovation-Free Dynamics

Milena S. Stojanović, Aleksandar S. Nastić, and Bogdan A. Pirković p. 1842  abstract

Design and Implementation of a Distribution-free Extended EWMA-DMA Control Diagram

Khanittha Talordphop, Yupaporn Areepong, and Saowanit Sukparungsee p. 1857  abstract

The Computational Fuzzy Mathematics of Mind and Compassion: A Buddhist Framework for Human-Centered Artificial Intelligence

Wichai Witayakiattilerd, Adoon Pansuwan, Wararit Panichkitkosolkul, and Andrei Volodin p. 1868  abstract

Stochastic Averaging Principle of Hilfer Fractional Stochastic Delay Differential Equations

Xinhai Xiao and Jingli Xie p. 1881  abstract

Mathematical Modeling of Polymer-surfactant Flooding in Porous Media: Testing and Applications for Real Rock

T. R. Zakirov, R. I. Kadyrov, A. F. Shakirzyanov, and A. S. Khayuzkin p. 1894  abstract