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Publisher : penza state university publishing house Subject : article subject Subject : lcsh Subject : qa1-939

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Academic Journal

Scientific research at the sub-department of higher and applied mathematics of Penza State University (1943–2023)

Authors : Il'ya V. Boykov

Subjects: Physics; QC1-999; Mathematics

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 4 (2023)

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Academic Journal

Researching the phase portrait for a differential equations system modelling competitive interaction

Authors : Maria R. Bortkovskaya

Subjects: ordinary differential equations; аutonomous 3 -dimensional system; dynamic modelling of competition

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

Studying the nonlinear mathematical model of the mechanical system 'pipeline – pressure sensor'

Authors : Petr A. Velmisov; Yulia A. Tamarova

Subjects: pressure sensor; pipeline; sensitive element

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

On infinitesimal transformations of Weil bundles as solutions of differential equation for Lie derivative of complete lift connection

Authors : Konstantin M. Budanov

Subjects: alternative representation; infinitesimal affine transformation; weil bundle

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

On nonlocal bifurcations in two-parameter families of vector fields on the plane with involutive symmetry

Authors : Vladimir Sh. Roitenberg

Subjects: planar vector field; dynamical system; saddle

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

On the solvability of the integral electric field equation for nonabsorbing media

Authors : Yuriy G. Smirnov

Subjects: integral equation; non-absorbing medium; solvability of the problem

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

A new approach to brachistochrone problem with an account dry friction

Authors : Sergey O. Gladkov

Subjects: brachistochrone; dry friction; equation of motion

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

Application of the continuous method for solving operator equations to the approximate solution of the amplitude-phase problem

Authors : Il'ya V. Boykov; Anastasiya A. Pivkina

Subjects: amplitude-phase problem; ill-posed problems; continuous method for solving operator equations

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

An integral equation method in the problem of electromagnetic wave propagation in a space filled with a locally inhomogeneous medium with a graphene layer at the boundary of the inhomogeneity region

Authors : Aleksey A. Tsupak

Subjects: electromagnetic wave propagation; graphene layer; maxwell's equations

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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Academic Journal

The microwave tomography method for solving the inverse problem on cylindrical bodies

Authors : Andrey O. Lapich; Mikhail Yu. Medvedik

Subjects: lippmann-schwinger integral equation; boundary value problem for the helmholtz equation; numerical method

Source: Известия высших учебных заведений. Поволжский регион: Физико-математические науки, Iss 1 (2024)

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