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Green matrix estimates of block Jacobi matrices II: Bounded gap in the essential spectrum

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arxiv 1905.04688 v3 pith:EGVLBTKJ submitted 2019-05-12 math-ph math.MP

Green matrix estimates of block Jacobi matrices II: Bounded gap in the essential spectrum

Jan Janas , Sergey Naboko , Luis O. Silva This is my paper
classification math-ph math.MP
keywords blockjacobiboundedessentialestimatesgreenmatricesmatrix
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This paper provides decay bounds for Green matrices and generalized eigenvectors of block Jacobi operators when the real part of the spectral parameter lies in a bounded gap of the operator's essential spectrum. The case of the spectral parameter being an eigenvalue is also considered. It is also shown that if the matrix entries commute, then the estimates can be refined. Finally, various examples of block Jacobi operators are given to illustrate the results.

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