The product of a regular form by a polynomial generalized: the case $xu=\lambda x^2v$

Abstract

We consider the problem: given a regular form (linear functional) $v$, find all the regular forms $u$ which satisfy the relation $xu=\lambda x^2v,\lambda \in\C -\{0\}$. We give the second-order recurrence relation of the orthogonal polynomial sequence with respect to $u$. Some examples are studied.