3 citations · 5 across the 4 of their papers we have counts for
4 papers
Group-theoretical origin of symmetries of hypergeometric class equations and functions
Jan Dereziński
We show that properties of hypergeometric class equations and functions become transparent if we derive them from appropriate 2nd order differential equations with constant coeffic…
On the Weyl symbol of the resolvent of the harmonic oscillator
Jan Dereziński, Maciej Karczmarczyk
We compute the Weyl symbol of the resolvent of the harmonic oscillator and study its properties.
Reduced and Extended Weak Coupling Limit
J. Derezinski, W. De Roeck
We give an extended review of recent work on the extended weak coupling limit. Background material on completely positive semigroups and their unitary dilations is given, as well a…
Classical scattering at low energies
J. Derezinski, E. Skibsted
For a class of negative slowly decaying potentials including the attractive Coulombic one we study the classical scattering theory in the low-energy regime. We construct a (continu…