46 citations · 164 across the 19 of their papers we have counts for
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math-ph2019★ 2 cited
An Evolution Equation Approach to Linear Quantum Field Theory
Jan Dereziński, Daniel Siemssen
In the first part of our paper we analyze bisolutions and inverses of (non-autonomous) evolution equations. We are mostly interested in pseudo-unitary evolutions on Krein spaces, w…
math.CA2019★ 6 cited
On the derivatives of the Heun functions
G. Filipuk, A. Ishkhanyan, J. Dereziński
The Heun functions satisfy linear ordinary differential equations of second order with certain singularities in the complex plane. The first order derivatives of the Heun functions…
math.CA2019
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…