Expansions of the solutions to the confluent Heun equation in terms of the Kummer confluent hypergeometric functions
@article{Ishkhanyan2014ExpansionsOT, title={Expansions of the solutions to the confluent Heun equation in terms of the Kummer confluent hypergeometric functions}, author={T. A. Ishkhanyan and Artur M. Ishkhanyan}, journal={arXiv: Classical Analysis and ODEs}, year={2014} }
We examine the series expansions of the solutions of the confluent Heun equation in terms of three different sets of the Kummer confluent hypergeometric functions. The coefficients of the expansions in general obey three-term recurrence relations defining double-sided infinite series; however, four-term and two-term relations are also possible in particular cases. The conditions for left- and/or right-side termination of the derived series are discussed.
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References
SHOWING 1-10 OF 22 REFERENCES
Incomplete beta-function expansions of the solutions to the confluent Heun equation
- Mathematics
- 2005
Several expansions of the solutions to the confluent Heun equation in terms of incomplete beta functions are constructed. A new type of expansion involving certain combinations of the incomplete beta…
Appell Hypergeometric Expansions of the Solutions of the General Heun Equation
- Mathematics
- 2014
Starting from a second-order Fuchsian differential equation having five regular singular points, an equation obeyed by a function proportional to the first derivative of the solution of the Heun…
New solutions of Heun general equation
- Mathematics
- 2003
We show that in four particular cases the derivative of the solution of Heun general equation can be expressed in terms of a solution to another Heun equation. Starting from this property, we use the…
On Certain Solutions for Confluent and Double-Confluent Heun Equations
- Mathematics
- 2008
This paper examines some solutions for confluent and double-confluent Heun equations. In the first place, we review two Leaver's solutions in series of regular and irregular confluent hypergeometric…
THE INTEGRABILITY OF THE TWO-STATE PROBLEM IN TERMS OF CONFLUENT HYPERGEOMETRIC FUNCTIONS
- Mathematics
- 1997
The reduction of the two-state problem to the confluent hypergeometric equation via complex transformations of independent variables is considered. It is shown that all the known analytically…
New solutions to the confluent Heun equation and quasiexact solvability
- Mathematics
- 2013
We construct new solutions in series of confluent hypergeometric functions for the confluent Heun equation (CHE). Some of these solutions are applied to the one-dimensional stationary Schr\"{o}dinger…
Confluent Heun equations: convergence of solutions in series of coulomb wavefunctions
- Mathematics
- 2013
The Leaver solutions in series of Coulomb wavefunctions for the confluent Heun equation are given by two-sided infinite series, that is, by series where the summation index n runs from minus to plus…
On the global representation of the solutions of second-order linear differential equations having an irregular singularity of rank one in :3WKby series in terms of confluent hypergeometric functions
- Mathematics
- 1986
A general second-order linear differential equation having an irregular singularity of rank one in $\infty $ is considered. It is shown that the solutions of this equation can be represented by…
About derivatives of Heun's functions from polynomial transformations of hypergeometric equations
- MathematicsAppl. Math. Comput.
- 2009
Potentials of the Heun class
- Mathematics
- 2013
We review different methods of generating potentials such that the one-dimensional Schrodinger equation (ODSE) can be transformed into the hypergeometric equation. We compare our results with…