Vol. 78 No. 9-10 (2026)

Published: 19.09.2026

Research articles

Lie- and point-symmetries of Nyzhnyk models

O. Vinnichenko, V. Boyko, R. Popovych

624–672
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Stability under perturbations of $\pi$-fraction approximants

V. Hladun

673–694
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Bounded solutions of a bilateral difference equation with unbounded piecewise constant operator coefficients

M. Horodnii, Ye. Tykha

695–703
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A problem with exponential integral conditions for a factorized partial differential equation

A. Kuz

704–726
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Application of solutions to the Thiele–Hermite problem for expanding the functions tg $z$, ctg $z$, th $z$, and cth $z$, in continued fractions

Yu. Myslo, M. Pahirya

727–742
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Explosion and implosion of continuous-time birth-and-death random walks

A. Pilipenko, V. Tkachenko

743–756
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Solvability of linear boundary-value problems for ordinary high-order differential systems in the spaces of continuously differentiable functions

V. Soldatov

757–769
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On the exponential-power growth at infinity of homeomorphisms of certain classes

M. Stefanchuk

770–785
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On the logarithmic growth of entire series in a system of functions

M. Sheremeta, O. Holovata, O. Mulyava

786–797
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On the growth of $m$-th $(m\geq 1)$ derivatives of algebraic polynomials in the whole complex plane for the domains with cusps

Fahreddin G. Abdullayev, Pelin Özkartepe

798–799
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Sharp results on the logarithmic coefficients for the classes $\mathcal{S}^{*}_S$ and $\mathcal{K}_S$

Molla Basir Ahamed, Sanju Mandal

800
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Fractal Hamiltonian systems

Bilender P. Allahverdiev, Hüseyin Tuna

801
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2-Local ring derivations on nest algebras determined through rank-one operators

Moin A. Ansari

802–803
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On a class of univalent functions defined using the Sǎlǎgean differential operator with square-root component of the derivative

Mihai Aron

804–805
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Discussion on the fractional Bullen estimation for twice-differentiable functions in the context of non-Newtonian calculus

Bouharket Benaissa

806–807
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On gradient generalized $\vartheta$-$\eta$-Ricci solitons with applications in space-times

Rajdip Biswas, Santu Dey, Young Jin Suh, Arindam Bhattacharyya

808–809
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Lagrangian extensions and left-symmetric structures on the four-dimensional real Lie superalgebras

Sofiane Bouarroudj, Ana-Maria Radu

810
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A new Grünwald–Letnikov operator using a continuous positive function

Martha Paola Cruz de la Cruz, Daniel Alfonso Santiesteban, José María Sigarreta

811–812
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Exact controllability and stability analysis for implicit fractional differential equations

Okan Duman

813–814
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Some inclusion properties for the class of $q$-calculus operators

R. M. El-Ashwah, W. Y. Kota

815
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The generalized inverse of the quaternion tensor via the M-product

Hongwei Jin, Yuzhen Wang, Shaowu Huang, Vasilios N. Katsikis

816–817
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On geometric properties of the Ramanujan entire-type function and its Alexander transform

Khaled Mehrez, Abdulaziz Alenazi

818–819
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Chaki and Deszcz submanifolds of Kenmotsu manifolds

Tuğba Mert

820–821
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Statistical convergence of Borel measurable functions at infinity via measure and modulus functions of order $\alpha$

Alifa Othman Aljamili, Mehmet Küçükaslan

822–823
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Spectral properties of zero divisor graphs of commutative rings

Bilal Ahmad Rather, Parvez Ali, Muhammed Imran, Zahid Raza

824–825
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Analytic resolvent approach to $\Psi$-fractional control systems with linear closed operators

Abdelmajid Salhi, Ali El Mfadel, Said Melliani

826–827
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Characterizations of weighted Triebel–Lizorkin spaces with variable smoothness and integrability

Shengrong Wang, Pengfei Guo, Jingshi Xu

828
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Characterization of the $(\kappa,\mu)$-space with Boeckx invariant $I=\pm1$

Yaning Wang, Tianci Liu, Miaojing Hou

829
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Orthogonality of $\mathfrak{p}$-angular distance in relation to double-parametric integrals

Jinyu Xia, Qi Liu, Yuxin Wang, Man Liang, Silvestru Sever Dragomir

830–831
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Entire solutions of a differential-difference equation of certain type and the differential-difference analog of the Brück conjecture

Junfeng Xu, Sujoy Majumder, Debabrata Pramanik

832–833
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Chronicles

International conference “Approximation Theory of Functions and Related Problems” on the occasion of the 70 th birthday of Prof. Anatolii Romaniuk

834–836
- PDF (Ukrainian)

Vol. 78 No. 9-10 (2026)

Research articles

Lie- and point-symmetries of Nyzhnyk models

Stability under perturbations of $\pi$-fraction approximants

Bounded solutions of a bilateral difference equation with unbounded piecewise constant operator coefficients

A problem with exponential integral conditions for a factorized partial differential equation

Application of solutions to the Thiele–Hermite problem for expanding the functions tg $z$, ctg $z$, th $z$, and cth $z$, in continued fractions

Explosion and implosion of continuous-time birth-and-death random walks

Solvability of linear boundary-value problems for ordinary high-order differential systems in the spaces of continuously differentiable functions

On the exponential-power growth at infinity of homeomorphisms of certain classes

On the logarithmic growth of entire series in a system of functions

On the growth of $m$-th $(m\geq 1)$ derivatives of algebraic polynomials in the whole complex plane for the domains with cusps

Sharp results on the logarithmic coefficients for the classes $\mathcal{S}^{*}_S$ and $\mathcal{K}_S$

Fractal Hamiltonian systems

2-Local ring derivations on nest algebras determined through rank-one operators

On a class of univalent functions defined using the Sǎlǎgean differential operator with square-root component of the derivative

Discussion on the fractional Bullen estimation for twice-differentiable functions in the context of non-Newtonian calculus

On gradient generalized $\vartheta$-$\eta$-Ricci solitons with applications in space-times

Lagrangian extensions and left-symmetric structures on the four-dimensional real Lie superalgebras

A new Grünwald–Letnikov operator using a continuous positive function

Exact controllability and stability analysis for implicit fractional differential equations

Some inclusion properties for the class of $q$-calculus operators

The generalized inverse of the quaternion tensor via the M-product

On geometric properties of the Ramanujan entire-type function and its Alexander transform

Chaki and Deszcz submanifolds of Kenmotsu manifolds

Statistical convergence of Borel measurable functions at infinity via measure and modulus functions of order $\alpha$

Spectral properties of zero divisor graphs of commutative rings

Analytic resolvent approach to $\Psi$-fractional control systems with linear closed operators

Characterizations of weighted Triebel–Lizorkin spaces with variable smoothness and integrability

Characterization of the $(\kappa,\mu)$-space with Boeckx invariant $I=\pm1$

Orthogonality of $\mathfrak{p}$-angular distance in relation to double-parametric integrals

Entire solutions of a differential-difference equation of certain type and the differential-difference analog of the Brück conjecture

Chronicles

International conference “Approximation Theory of Functions and Related Problems” on the occasion of the 70 th birthday of Prof. Anatolii Romaniuk

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Vol. 78 No. 9-10 (2026)

Research articles

Chronicles

Language

Information

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Latest publications

Make a Submission