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This article is cited in 1 scientific paper (total in 1 paper)
Mathematics
About new approach to solution of Riemann's boundary value problem with condition on the half-line in case of infinite index
R. B. Salimov Kazan State University of Architecture and Engineering, 1, Zelenaya st., Kazan, Russia, 420043
Abstract:
To solve a homogeneous Riemann boundary value problem with infinite index and condition on the half-line we propose a new approach based on the reduction of the considered problem to the corresponding task with the condition on the real axis and finite index. It is required to define a function $\Phi(z)$, analytic and bounded in the complex plane $z$, cut down on positive real semi-axis $L^+$, if the edge condition $\Phi^{+}(t)=G(t) \Phi^{-}(t)$, $t\in L^{+}$ is fulfilled, where $\Phi^{+}(t)$, $\Phi^{-}(t)$ are limit values of the function $\Phi(z)$, as $z\to t$ correspondingly on the left and on the right, $G(t)$ is a given function, for which argument $\arg G(t)=\nu^{-}t^{\rho}+\nu(t)$, $t\in L^{+}$ holds, here $\nu^{-}$, $\rho$ are given numbers, $\nu^{-}>0$, $\frac{1}{2}<\rho<1$, and $\ln|G(t)|$, $\nu(t)$ are functions which satisfy the Holder condition. It is admitted that $G(t)=1$ at $t\in(-\infty,0)$. The functions $E^{+}(z)=e^{(\alpha+i\beta)z^{\rho}}$, $0\le \arg z \le \pi$, $E^{-}(z)=e^{(\alpha-i\beta)z^{\rho}}$, $-\pi\le \arg z \le 0$ are used to avoid infinite gap of the $\arg G(t)$, by the selection of real numbers $\alpha$, $\beta$.
Key words:
Riemann boundary value problem, analytic functions, infinite index.
Citation:
R. B. Salimov, “About new approach to solution of Riemann's boundary value problem with condition on the half-line in case of infinite index”, Izv. Saratov Univ. Math. Mech. Inform., 16:1 (2016), 29–33
Linking options:
https://www.mathnet.ru/eng/isu618 https://www.mathnet.ru/eng/isu/v16/i1/p29
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