8 citations · 14 across the 6 of their papers we have counts for
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math.SP2022★ 8 cited
An improved discrete Rellich inequality on the half-line
Borbala Gerhat, David Krejcirik, Frantisek Stampach
Based on a new idea of factorization, we prove an improved discrete Rellich inequality and discuss its optimality. We also give a conjecture on improved higher order discrete Hardy…
math.SP2022
Schur complement dominant operator matrices
Borbala Gerhat
We propose a method for the spectral analysis of unbounded operator matrices in a general setting which fully abstains from standard perturbative arguments. Rather than requiring t…
math.SP2022★ 5 cited
Pseudo Numerical Ranges and Spectral Enclosures
Borbala Gerhat, Christiane Tretter
We introduce the new concepts of pseu\-do numerical range for operator functions and families of sesquilinear forms as well as the pseu\-do block numerical range for o…