Vol 34, No 1 (2026)

DOI: https://doi.org/10.15421/24263401

Published: online 28.07.2026

Table of Contents

Preamble
 
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1-2

Articles

A family of maximal subalgebras of the Lie algebra $$$W_n(K)$$$
Y.Y. Chapovskyi, O.Ya. Kozachok, A.P. Petravchuk
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3-15
Note on the number of doppelsemigroups of small order
V.M. Gavrylkiv
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16-33
Approximation properties of some singular integral on the classes of functions defined by the modulus of continuity
I.V. Kal'chuk, Yu.I. Kharkevych
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34-48
On Regularity of Variational and Duality Solutions for One Class of Degenerate Elliptic Equations
P. Kogut
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49-75
On the structure of one-generated Leibniz rings
L.A. Kurdachenko, P.Ye. Minaiev, O.O. Pypka
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76-89
Transposed Poisson structures on $$$\mathfrak{osp}(1,2)$$$
V. López Solı́s
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90-101
Approximation of optimal control for functional-differential equations by optimal control of equations without delay in infinite-dimensional spaces
O.V. Perehuda, O.A. Kapustian, V.V. Mogylova
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102-122
Infinite Bernoulli convolutions generated by multigeometric series and their properties
M.V. Pratsiovytyi, D.M. Karvatskyi, O.P. Makarchuk
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123-139
Fibonacci and Lucas numbers close to Narayana's cows numbers
A. Satapathy, B.P. Tripathy, U.K. Dutta, B.K. Patel
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140-152
Canonical form of low-dimensional matrices with respect to one-sided transformations
V.P. Shchedryk
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153-177
Analogues of Fermat's extreme value theorem and Cauchy's mean value theorem in commutative algebras
V. Shpakivskyi
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178-187
Submonoids of integer group determinants
Y. Wakamoto, N. Yamaguchi
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188-198