J. Derezi'nski

activity

20042021

most citedBosonic quadratic Hamiltonians

46 citations · 164 across the 19 of their papers we have counts for

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2 papers · 1 filter

math.FA2021

Perturbed Bessel operators

Jan Dereziński, Jérémy Faupin

We study perturbed Bessel operators $L_{m^{2}} = - \partial_{x}^{2} + (m^{2} - \frac{1}{4}) \frac{1}{x ^{2}} + Q (x)$ on $L^{2}] 0, \infty [$ , where $m \in C$ and $Q$ is a complex locally integra…

math.FA2013★ 5 cited

Continuous and holomorphic functions with values in closed operators

Jan Dereziński, Michał Wrochna

We systematically derive general properties of continuous and holomorphic functions with values in closed operators, allowing in particular for operators with empty resolvent set.…