11 citations · 62 across the 21 of their papers we have counts for
4 papers · 1 filter
On transfer operators on the circle with trigonometric weights
Xianghong Chen, Hans Volkmer
We study spectral properties of the transfer operators defined on the circle by $$(Lu)(t)=\frac{1}{d}\sum_{i=0}^{d-1} f\left(\frac{t+i}{d}\right…
The modulus of Whittaker functions
Hans Volkmer
The paper discusses some properties of the modulus of the Whittaker function . In particular, completely monotone functions expressed in terms of $|W_{k,…
Convergence of Magnus integral addition theorems for confluent hypergeometric functions
Howard S. Cohl, Jessie Hirtenstein, Hans Volkmer
In 1946, Magnus presented an addition theorem for the confluent hypergeometric function of the second kind with argument expressed as an integral of a product of two '…
The Asymptotic Expansion of Kummer Functions for Large Values of the -Parameter, and Remarks on a Paper by Olver
Hans Volkmer
It is shown that a known asymptotic expansion of the Kummer function as tends to infinity is valid for on the full Riemann surface of the logarithm. A correspond…