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JOURNALS // Ufimskii Matematicheskii Zhurnal // Archive

2021, Volume 13, Issue 2


Alexey Borisovich Shabat and Ravil Islamovich Yamilov. Memories
A. K. Yaikbaeva, S. I. Yamilova
3
On integrability of $O(3)$–model
A. B. Borisov
6
On generalizations of Chebyshev polynomials and Catalan numbers
B. S. Bychkov, G. B. Shabat
11
On integrability of semi-discrete Tzitzeica equation
R. N. Garifullin
18
Integrals and characteristic Lie rings of semi-discrete systems of equations
A. V. Zhiber, M. N. Kuznetsova
25
General solutions of some linear equations with variable coefficients
O. V. Kaptsov, M. M. Mirzaokhmedov
36
Characteristic algebras and integrable exponential systems
D. V. Millionshchikov, S. V. Smirnov
44
Discrete Riemann-Hilbert problem and interpolation of entire functions
V. Yu. Novokshenov
74
Finite-gap solutions of nonlocal equations in Ablowitz-Kaup-Newell-Segur hierarchy
A. O. Smirnov, V. B. Matveev
86
Integrable Abel equation and asymptotics of symmetry solutions of Korteweg-de Vries equation
B. I. Suleimanov, A. M. Shavlukov
104
Differential substitutions for non-Abelian equations of KdV type
V. E. Adler
112
On mKdV equations related to Kac-Moody algebras $A_5^{(1)}$ and $A_5^{(2)}$
V. S. Gerdjikov
121
Generalized invariant manifolds for integrable equations and their applications
I. T. Habibullin, A. R. Khakimova, A. O. Smirnov
141
Yamilov's theorem for differential and difference equations
Decio Levi, Miguel A. Rodríguez
158
On Darboux non-integrability of Hietarinta equation
S. Ya. Startsev
166
On discretization of Darboux Integrable Systems admitting second-order integrals
K. Zheltukhin, N. Zheltukhina
176


© Steklov Math. Inst. of RAS, 2026