114 citations · 767 across the 136 of their papers we have counts for
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math.CA2016
Renormalized oscillation theory for Hamiltonian systems
Fritz Gesztesy, Maxim Zinchenko
We extend a result on renormalized oscillation theory, originally derived for Sturm-Liouville and Dirac-type operators on arbitrary intervals in the context of scalar coefficients,…
math.CA2016
On (conditional) positive semidefiniteness in a matrix-valued context
Fritz Gesztesy, Michael Pang
In a nutshell, we intend to extend Schoenberg's classical theorem connecting conditionally positive semidefinite functions , …