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Approximation of a linear system of second-order differential equations
Yu. Ya. Belov Krasnoyarsk State University
Abstract:
In a Hilbert space $H$ we consider the approximation by systems
\begin{equation}
\frac{d^2u_1}{dt^2}=A_{11}u_1+A_{12}u_2+f_1,\quad\varepsilon\frac{d^2u_2}{dt_2}A_2u_1+A_{22}u_2+f_2,\quad\varepsilon>0,\tag{1}
\end{equation}
of the semievolutionary system obtained from (1) when $\varepsilon=0$. Under certain conditions on the solutions of the Cauchy problem for system (1) and the existence of a bounded linear operator $A_{22}^{-1}$ we establish the convergence of the solutions $u^\varepsilon$ ($\varepsilon\to0$) to a solution of the corresponding problem for system (1) with $\varepsilon=0$. We also establish the uniform correctness of the Cauchy problem for the above system.
Received: 12.07.1974
Citation:
Yu. Ya. Belov, “Approximation of a linear system of second-order differential equations”, Mat. Zametki, 20:5 (1976), 693–702; Math. Notes, 20:5 (1976), 948–953
Linking options:
https://www.mathnet.ru/eng/mzm7894 https://www.mathnet.ru/eng/mzm/v20/i5/p693
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