8 citations · 13 across the 3 of their papers we have counts for
3 papers
math.SP2026
Schrödinger operators with accretive potentials in weighted spaces
Borbala Gerhat, Petr Siegl
We analyse Schrödinger operators with accretive potentials in weighted spaces. We find conditions on potentials and weights for which the Dirichlet realisation, introduced by gener…
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★ 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…