%Base form, please do not alter.
\documentclass[11pt]{amsart}
\linespread{1.1}
\newenvironment{definition}{\par\addvspace{3pt}\noindent\textbf{Definition.}}{\par\addvspace{3pt}}\newenvironment{example}{\par\addvspace{3pt}\noindent\textbf{Example.}}{\par\addvspace{3pt}}\newenvironment{theorem}{\par\addvspace{3pt}\noindent\textbf{Theorem.}\itshape}{\par\addvspace{3pt}}\newenvironment{corollary}{\par\addvspace{3pt}\noindent\textbf{Corollary.}\itshape}{\par\addvspace{3pt}}\newenvironment{conjecture}{\par\addvspace{3pt}\noindent\textbf{Conjecture.}\itshape}{\par\addvspace{3pt}}\newenvironment{remark}{\par\addvspace{3pt}\noindent\textit{Remark.}}{\par\addvspace{3pt}}
%\theoremstyle{definition}\newtheorem{definition}{Definition}\newtheorem{example}{Example}\theoremstyle{theorem}\newtheorem{theorem}{Theorem}\newtheorem{corollary}{Corollary}\newtheorem{conjecture}{Conjecture}\theoremstyle{remark}\newtheorem{remark}{Remark}
\newenvironment{abstitle}{\par\noindent\Large\bfseries\ignorespaces}{}
\newenvironment{absauthor}{\par\ignorespaces}{}
\newenvironment{university}{\par\itshape\ignorespaces}{}
\newenvironment{mail}{\par\ttfamily\ignorespaces}{}
\newenvironment{coauthors}{\par\ignorespaces Coauthors:}{\par\addvspace{3pt}}
\newenvironment{references}{\par\addvspace{3pt}\noindent\ignorespaces \textbf{References}\renewcommand\labelenumi{[\theenumi]}\begin{enumerate}}{\end{enumerate}}
%Author defined commands and environments. Please use only if you cannot avoid it.

\begin{document}

%Title of the talk

\begin{abstitle}
Title
\end{abstitle}

%Name

\begin{absauthor}
Olaf Obvious
\end{absauthor}

%University

\begin{university}
University of Trivialities
\end{university}

%E-amil address

\begin{mail}
oli-obvi@math.uni-trivi.hu
\end{mail}

%Coauthors

\begin{coauthors}
Eve Evident
\end{coauthors}

%Content of the abstract. If you would like to use theorem-like environments, please stick with the ones defined in the preamble.

Please write here your abstract.

%References - If you wish to use references please use the below commands, otherwise just delete this part

%\begin{references}
%\item Leslie Lamport, \emph{\LaTeX : A Document Preparation System} Addison-Wesley, Reading, %Massachusetts, second edition, 1994, ISBN 0-201-52983-1.
%\end{references}

\end{document}