\documentclass[12pt,a4paper]{amsart}
\usepackage{latexsym}
\usepackage{amsmath,amsthm,amssymb,amsfonts}


\allowdisplaybreaks


\setlength{\textwidth}{16cm} \setlength{\oddsidemargin}{0.25cm}
\setlength{\evensidemargin}{0.25cm} \setlength{\topmargin}{1.2cm}

\linespread{1.3}


\newcommand{\head}{
{\noindent \small IX Jaen Conference on Approximation\\ \'{U}beda,
July 8th -- July 13th, 2018 } \vspace{10pt}}
\renewcommand{\refname}{Bibliography}


\newtheorem{theorem}{Theorem}
\newtheorem{remark}{Remark}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{definition}[theorem]{Definition}



\begin{document}



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\newcommand{\RR}{\mathbb{R}}
\newcommand{\NN}{\mathbb{N}}

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\head \vspace{1.5cm}


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%               Underline the name of the speaker.
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\title{Insert here the title of the talk}


% underline the speaker
\author{\underline{First author}, Second author  and Last author}

\thanks {Insert here, if there exist, the organizations that support your research.}

\maketitle

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% Write here the authors and a short tittle for the headlines
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\markboth{First author, Second author and Last author}{Short title of the talk}

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\begin{center} \textbf{Abstract}
\end{center}


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%               Insert here your abstract
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Insert here the text of your abstract.
Please use the definition included in the template for the usual environments: theorem, lemma, corollary, etc.
Also you can make use of the command defined in the template for the real numbers, $\RR$, or natural numbers, $\NN$.










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\bigskip

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\textbf{Keywords:} asymptotic formula, shape preserving
approximation, simultaneous approximation, saturation.

\textbf{AMS Classification:} 41A28, 41A40, 41A60.

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%               Insert here the Bibliography
%               Utilize a format similar to the one that you can see in the following
%               examples
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\begin{thebibliography}{99}



\bibitem{Berens} \textbf{H. Berens},
Pointwise saturation of positive operators, {\emph{J. Approx.
Theory}} {\bf 6} (1972) 135--146.

\bibitem{Bonsall} \textbf{F. F. Bonsall},
The Characterization of Generalized Convex Functions,
{\emph{Quart. J. Math. Oxford Ser.(2)}} {\bf 1} (1950) 100--111.

\bibitem{KarlinStudden} \textbf{S. J. Karlin and W. J. Studden},
{\emph{Tchebycheff Systems}}, Interscience,  New York, 1966.


\bibitem{jcam} \textbf{A.-J. L\'{o}pez-Moreno and F.-J. Mu\~{n}oz-Delgado,}
Asymptotic expansion of multivariate conservative linear
operators, {\emph{J. Comput. Appl. Math.}} {\bf 150} (2003)
219--251.

\bibitem{LorentzSchumaker} \textbf{G. G. Lorentz and L. L. Schumaker},
Saturation of Positive Operators, {\emph{J. Approx. Theory}} {\bf
5} (1972) 413--424.

\bibitem{Pesin} \textbf{I. Pesin},
\emph{Classical and Modern Integration Theories}, Academic Press,
New York, 1951.

\end{thebibliography}


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\bigskip


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{\footnotesize\noindent First author,\\
First author-address-line 1,\\
First author-address-line 2.\\
{\tt firstauthor@xxxxxxx.xxx}

\bigskip

Second author,\\
Second author-address-line 1,\\
Second author-address-line 2.\\
{\tt secondauthor@xxxxxxx.xxx}

\bigskip

Last author,\\
Last author-address-line 1,\\
Last author-address-line 2.\\
{\tt lastauthor@xxxxxxx.xxx}

\mbox{ }}


\end{document}
