Geodesic
Eigenvalues and eigenvectors of a perturbed operator
Issledovaniya po Prikladnoi Matematike i Informatike, Issledovaniya po Prikladnoi Matematike (1989), pp. 131-138.

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@article{KUIPM_1989_a13,
     author = {A. M. Sidorov},
     title = {Eigenvalues and eigenvectors of a perturbed operator},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {131--138},
     publisher = {mathdoc},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1989_a13/}
}
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EP  - 138
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KUIPM_1989_a13/
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ID  - KUIPM_1989_a13
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%T Eigenvalues and eigenvectors of a perturbed operator
%J Issledovaniya po Prikladnoi Matematike i Informatike
%D 1989
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A. M. Sidorov. Eigenvalues and eigenvectors of a perturbed operator. Issledovaniya po Prikladnoi Matematike i Informatike, Issledovaniya po Prikladnoi Matematike (1989), pp. 131-138. http://geodesic.mathdoc.fr/item/KUIPM_1989_a13/