# Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, 2023, vol. 23, iss. 3

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## Content

### Mathematics

Belkina T. A., Ogareva A. S.
Risky investments and survival probability in the insurance model with two-sided jumps: Problems for integrodifferential equations and ordinary differential equation and their equivalence
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278

Boykov I. V., Ryazantsev V. A.
On the iterative method for solution of direct and inverse problems for parabolic equations
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286

Kurdyumov V. P.
Classic and generalized solutions of the mixed problem for wave equation with a summable potential. Part I. Classic solution of the mixed problem
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311

Lukomskii S. F., Kruss I. S.
Unitary extension principle on zero-dimensional locally compact groups
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320

Stash A. K., Loboda N. A.
On the question of the residual of strong exponents of oscillation on the set of solutions of third-order differential equations
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348

Hoang V. N., Preovotorov V. V.
Stability of three-layer differential-difference schemes with weights in the space of summable functions with supports in a network-like domain
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357

### Mechanics

Karpov V. V., Bakusov P. A., Maslennikov A. M., Semenov A. A.
Simulation models and research algorithms of thin shell structures deformation Part I. Shell deformation models
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370