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DEPENDENCE OF THE SPECTRUM OF A QUANTUM GRAPH ON VERTEX CONDITIONS AND EDGE LENGTHS

by Gregory Berkolaiko, Peter Kuchment
"... Abstract. We study the dependence of the quantum graph Hamiltonian, its resolvent, and its spectrum on the vertex conditions and graph edge lengths. In particular, several results on the interlacing (bracketing) of the spectra of graphs with different vertex conditions are obtained and their applica ..."
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Abstract. We study the dependence of the quantum graph Hamiltonian, its resolvent, and its spectrum on the vertex conditions and graph edge lengths. In particular, several results on the interlacing (bracketing) of the spectra of graphs with different vertex conditions are obtained and their applications are discussed. 1.