# Supersymmetric generalized power functions

## TL;DR

This paper introduces supersymmetric generalized power functions, called mbda-generalized powers, which serve as a natural basis for solving Sturm-Liouville and Schr46dinger equations, revealing new identities and solution representations.

## Contribution

It develops the theory of mbda-generalized powers, including their properties, identities, and application to differential equations in supersymmetric quantum mechanics.

## Key findings

- mbda-generalized powers form a fundamental solution set for certain differential equations.
- Derived supersymmetric identities and a Taylor series expansion for these functions.
- Presented a solution representation for the stationary Schr46dinger equation using geometric series.

## Abstract

Complex-valued functions defined on a finite interval $[a,b]$ generalizing power functions of the type $(x-x_0)^n$ for $n\geq 0$ are studied. These functions called $\Phi$-generalized powers, $\Phi$ being a given nonzero complex-valued function on the interval, were considered to contruct a general solution representation of the Sturm-Liouville equation in terms of the spectral parameter \cite{kravchenko2008, kravporter2010}. The $\Phi$-generalized powers can be considered as a natural basis functions for the one-dimensional supersymmetric quantum mechanics systems taking $\Phi=\psi_0^2$, where the function $\psi_0(x)$ is the ground state wave function of one of the supersymmetric scalar Hamiltonians. Several properties are obtained such as $\Phi$-symmetric conjugate and antisymmetry of the $\Phi$-generalized powers, a supersymmetric binomial identity for these functions, a supersymmetric Pythagorean elliptic (hyperbolic) identity involving four $\Phi$-trigonometric ($\Phi$-hyperbolic) functions as well as a supersymmetric Taylor series expressed in terms of the $\Phi$-derivatives. We show that the first $n$ $\Phi$-generalized powers are a fundamental set of solutions associated with a nonconstant coefficients homogeneous linear ordinary differential equations of order $n+1$. Finally, we present a general solution representation of the stationary Schr\"odinger equation in terms of geometric series where the Volterra compositions of the first type is considered.