Content
Volume 18 (2021), N 2

Mathematical logic, algebra and number theory

Ibraev Sh. Sh., Turbayev B. T.
Cohomology for the Lie algebra of type A₂ over a field of characteristic 2, pp. 729-739.
PDF DOI 10.33048/semi.2021.18.053

Ghaedan N., Vedadi M. R.
When a (dual-)Baer module is a direct sum of (co-)prime modules, pp. 782-791.
PDF DOI 10.33048/semi.2021.18.057

Geometry and Topology

Sabitovv I. Kh.
New proofs of infinitesimal rigidity of convex polyhedra and convex surfaces of revolution, pp. 740-743. [Russian, English abstract]
PDF DOI 10.33048/semi.2021.18.054

Blali A., El Amrani A., Hassani R. A., Razouki A.
On the uniqueness of I-limits of sequences, pp. 744-757.
PDF DOI 10.33048/semi.2021.18.055

Discrete mathematics and mathematical cybernetics

Tsiovkina L. Yu.
On a class of vertex-transitive distance-regular covers of complete graphs, pp. 758-781. [Russian, English abstract]
PDF DOI 10.33048/semi.2021.18.056

Computational mathematics

Lomov A. A.
Operator-orthoregressive methods for identifying coefficients of linear difference equations, pp. 792-804.
PDF DOI 10.33048/semi.2021.18.058

Germider O. V., Popov V. N.
An application of the Chebyshev collocation method for the calculation of a mass flux in a long concentric annular channel, pp. 805-816.
PDF DOI 10.33048/semi.2021.18.059

Probability theory and mathematical statistics

Zhou Q. Q., Logachov A. V.
Moderate deviations principle for independent random variables under sublinear expectations, pp. 817-826.
PDF DOI 10.33048/semi.2021.18.060

Differential equations, dynamical systems and optimal control

Korablina E. V., Levenshtam V. B.
Reconstruction of a high-frequency source term of the wave equation from the asymptotics of the solution. Case of the Cauchy problem, pp. 827-833.
PDF DOI 10.33048/semi.2021.18.061

Mathematical life

Gorodilova A. A., Tokareva N. N., Agievich S. V., Carlet C., Idrisova V. A., Kalgin K. V., Kolegov D. N., Kutsenko A. V., Mouha N., Pudovkina M. A., Udovenko A. N.
The Seventh International Olympiad in Cryptography: problems and solutions, pp. А4-А29.
PDF DOI 10.33048/semi.2021.18.061