Title: The Ringel dual of the Auslander-Dlab-Ringel algebra,
Abstract: The ADR algebra $R_A$ of a finite-dimensional algebra $A$ is a
quasihereditary algebra. In this paper we study the Ringel dual
$\mathcal{R}(R_A)$ of $R_A$. We prove that $\mathcal{R}(R_A)$ can be identified
with $(R_{A^{op}})^{op}$, under certain 'minimal' regularity conditions for
$A$. We also give necessary and sufficient conditions for the ADR algebra to be
Ringel selfdual.