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math.SP2017
On the extremal extensions of a non-negative Jacobi operator
Aleksandra Ananieva, Nataly Goloshchapova
We consider minimal non-negative Jacobi operator with matrix entries. Using the technique of boundary triplets and the corresponding Weyl functions, we describe the Fri…
math.SP2016
To the Spectral Theory of the Bessel Operator on Finite Interval and Half-Line
Aleksandra Ananieva, Viktoriya Budika
The minimal and maximal operators generated by the Bessel differential expression on the finite interval and a half-line are studied. All non-negative self-adjoint extensions of th…