On the Estimates of Periodic Eigenvalues of Sturm–Liouville Operators with Trigonometric Polynomial Potentials

2021 ◽  
Vol 109 (5-6) ◽  
pp. 794-807
Author(s):  
C. Nur
2020 ◽  
Vol 28 (3) ◽  
pp. 449-463 ◽  
Author(s):  
Natalia P. Bondarenko ◽  
Chung-Tsun Shieh

AbstractIn this paper, partial inverse problems for the quadratic pencil of Sturm–Liouville operators on a graph with a loop are studied. These problems consist in recovering the pencil coefficients on one edge of the graph (a boundary edge or the loop) from spectral characteristics, while the coefficients on the other edges are known a priori. We obtain uniqueness theorems and constructive solutions for partial inverse problems.


Author(s):  
Natalia Bondarenko ◽  
Chung-Tsun Shieh

In this paper, inverse spectral problems for Sturm–Liouville operators on a tree (a graph without cycles) are studied. We show that if the potential on an edge is known a priori, then b – 1 spectral sets uniquely determine the potential functions on a tree with b external edges. Constructive solutions, based on the method of spectral mappings, are provided for the considered inverse problems.


Author(s):  
Thomas Beck ◽  
Isabel Bors ◽  
Grace Conte ◽  
Graham Cox ◽  
Jeremy L. Marzuola

Author(s):  
Steve Clark ◽  
Fritz Gesztesy

We derive Povzner–Wienholtz-type self-adjointness results for m × m matrix-valued Sturm–Liouville operators in L2((a, b);R dx)m, m ∈ N, for (a, b) a half-line or R.


2007 ◽  
Vol 86 (10) ◽  
pp. 1211-1221 ◽  
Author(s):  
Rafael Del Rio ◽  
Carmen A. Martinez

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