\documentclass{elsart}
\usepackage{latexsym}

\begin{document}
\begin{frontmatter}
\journal{J. Mol. Struct. (Theochem)}
\title{Correlation Energy Estimators based on M{\o}ller-Plesset
Perturbation Theory}
\author{Herbert H. H. Homeier\thanksref{HHHH}}
\address{
 Institut f\"ur Physikalische und Theoretische Chemie,
 Universit\"at Regensburg,
 D-93040 Regensburg, Germany}
\thanks[HHHH]{na.hhomeier@na-net.ornl.gov, %
http://rchs1.uni-regensburg.de/\%7Ec5008/}

\begin{abstract}
Some methods for the convergence acceleration of the M{\o}ller-Plesset
perturbation series for the correlation energy are discussed. The
order-by-order summation is less effective than the Feenberg series. The
latter is obtained by renormalizing the unperturbed Hamilton operator
by a constant factor that is optimized for the third order energy. In
the fifth order case, the Feenberg series can be improved by
order-dependent optimization of the parameter. Alternatively, one may
use Pad\'e approximants or a further method based on effective
characteristic polynomials to accelerate the convergence of the
perturbation series. Numerical evidence is presented that, besides the
Feenberg-type approaches, suitable Pad\'e approximants, and also the
effective second order characteristic polynomial, are excellent tools
for correlation energy estimation. %
%
\end{abstract}
\begin{keyword}
Many-body perturbation theory\sep  convergence acceleration\sep
extrapolation\sep
M{\o}ller-Plesset series\sep  Feenberg series\sep  Pad\'e approximants\sep
effective characteristic polynomials
\end{keyword}
\end{frontmatter}

\end{document}