13 Oct 2016
•
Idrissi Kaissar
•
Zerouali El Hassan
We introduce a new strategy in solving the truncated complex moment problem. To this aim we investigate recursive doubly indexed sequences and their
characteristic polynomials...A characterization of recursive doubly indexed
\emph{moment} sequences is provided. As a simple application, we obtain a
computable solution to the complex moment problem for cubic harmonic
characteristic polynomials of the form $z^3+az+b\overline{z}$, where $a$ and
$b$ are arbitrary real numbers. We also recapture a recent result due to
Curto-Yoo given for cubic column relations in $M(3)$ of the form
$Z^3=itZ+u\overline{Z}$ with $t,u$ real numbers satisfying some suitable
inequalities. Furthermore, we solve the truncated complex moment problem with
column dependence relations of the form $Z^{k+1}= \sum\limits_{0\leq n+ m \leq
k} a_{nm} \overline{Z}^n Z^m$ ($a_{nm} \in \mathbb{C}$).(read more)