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q-difference equations associated with the Rubin's q-difference operator $\partial_{q}$ (2001.10901v1)

Published 29 Jan 2020 in math.AP

Abstract: The aim of this paper is to prove the existence and uniqueness of solutions of the following $q$- Cauchy problem of second order linear $q$-difference problem associated with the Rubin's $q$- difference operator $\partial_q$ in a neighborhood of zero \begin{equation} \left{ \begin{array}{cc} q\,a_0(x)\, \partial_q2y(qx)\, +\ ,a_1(x)\,\partial_qy(x)\, + \,a_2(x)y(x) &\; = \;b(x),\quad \hbox{if $y$ is odd;}\ q\,a_0(x) \partial_q2y(qx)\, + \,q\,a_1(x)\partial_qy(qx)\, + \,a_2(x)y(x)&\; = \;b(x),\quad \hbox{if $y$ is even,} \end{array} \right. \end{equation} with the initial conditions \begin{equation} \partial_{q}{i-1}y(0)= b_{i};\quad b_{i} \in{\mathbb{C}},\; i=1,2 \end{equation} where $a_i$, $i=0,1,2$, and $b$ are defined, continuous at zero and bounded on an interval $I$ containing zero such that $a_0(x)\neq 0$ for all $x\in I$. Then, as application of the main results, we study the second order homogenous linear $q$- difference equations as well as the $q$-Wronskian associated with the Rubin's $q$-difference operator $\partial_q$. Finally, we construct a fundamental set of solutions for the second order linear homogeneous $q$-difference equations in the cases when the coefficients are constants and $a_1(x)=0$ for all $x\in I$.

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