Deformed Homogeneous $(s,t)$-Rogers-Szegö Polynomials and the Deformed $(s,t)$-Exponential Operator e$_{s,t}(y{\rm T}_a D_{s,t},v)$

This article introduces the deformed homogeneous $(s,t)$-Rogers-Szeg\"o polynomials h$_{n}(x,y;s,t,u,v)$. These polynomials are a generalization of the Rogers-Szeg\"o polynomials and the $(p,q)$-Rogers-Szeg\"o polynomials defined by Jagannathan. By using the deformed $(s,t)$-exponential operator based on operator T$_{a}D_{s,t}$ we find identities involving the polynomials h$_{n}(x,y;s,t,u,v)$, together with generalizations of the Mehler and Rogers formulas. In addition, a generating function for the polynomials h$_{n}(x,y;s,t,u,v)$ is found employing the deformed $\frac{\varphi}{u}$-commuting operators. A representation of deformed $(s,t)$-exponential function as the limit of a sequence of deformed $(s,t)$-Rogers-Szeg\"o polynomials is obtained.