Abstract
The paper is devoted to the study of Nijenhuis operators of arbitrary dimension \(n\) in a neighborhood of a point at which the first \(n-1\) coefficients of the characteristic polynomial are functionally independent and the last coefficient (the determinant of the operator) is an arbitrary function. We prove a theorem on the general form of such Nijenhuis operators and also obtain their complete description for the case in which the determinant has a nondegenerate singularity.
DOI 10.1134/S106192082204001X
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Acknowledgments
The author thanks A.A. Oshemkov, E.A. Kudryavtseva, A.Yu. Konyaev, V.A. Kibkalo, V.N. Zavyalov, and all participants of the seminar “Algebra and Geometry of Integrable Systems” for valuable advice.
Funding
The author was supported by the scholarship of Theoretical Physics and Mathematics Advancement Foundation “BASIS.”
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Akpan, D.Z. Almost Differentially Nondegenerate Nijenhuis Operators. Russ. J. Math. Phys. 29, 413–416 (2022). https://doi.org/10.1134/S106192082204001X
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DOI: https://doi.org/10.1134/S106192082204001X