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Trudy Matematicheskogo Instituta imeni V.A. Steklova, 2006, Volume 255, Pages 116–135
(Mi tm257)
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This article is cited in 3 scientific papers (total in 3 papers)
On the Stability of the Index of Unbounded Nonlocal Operators in Sobolev Spaces
P. L. Gurevich Peoples Friendship University of Russia
Abstract:
Unbounded operators corresponding to nonlocal elliptic problems on a bounded region $G\subset\mathbb R^2$ are considered. The domain of these operators consists of functions in the Sobolev space $W_2^m(G)$ that are generalized solutions of the corresponding elliptic equation of order $2m$ with the right-hand side in $L_2(G)$ and satisfy homogeneous nonlocal boundary conditions. It is known that such unbounded operators have the Fredholm property. It is proved that lower order terms in the differential equation do not affect the index of the operator. Conditions under which nonlocal perturbations on the boundary do not change the index are also formulated.
Received in May 2005
Citation:
P. L. Gurevich, “On the Stability of the Index of Unbounded Nonlocal Operators in Sobolev Spaces”, Function spaces, approximation theory, and nonlinear analysis, Collected papers, Trudy Mat. Inst. Steklova, 255, Nauka, MAIK «Nauka/Inteperiodika», M., 2006, 116–135; Proc. Steklov Inst. Math., 255 (2006), 108–126
Linking options:
https://www.mathnet.ru/eng/tm257 https://www.mathnet.ru/eng/tm/v255/p116
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