\documentclass[10pt]{amsart}
\usepackage{mmm}
%\usepackage{refcheck} % You can check uncited references with this package
\newtheorem{question}{Open question}
\begin{document}
% Only first case and special words should be given with capital letter
\title{Title of the Article}
\author{Author1*\orcidlink{}}
\author{Author2\orcidlink{}}
\address{Author1\newline
\indent Selçuk University \newline
\indent Department of Mathematics \newline
\indent Str No, code, town, country}
\email{email address}
\address{Author2\newline
\indent Selçuk University \newline
\indent Department of Mathematics \newline
\indent Str No, code, town, country}
\email{email address}
\setcounter{page}{1}% to be added afterwards
\coordinates{xx}{2023}{1}{00-00}% to be added afterwards
\date{xx.xx.xxxx}% to be added afterwards % submission date
\undate{xx.xx.xxxx}% to be added afterwards % accepted date
\adate{xx.xx.xxxx}% to be added afterwards % published online date
\corauthor{NAME of the corresponding author; email address}
\begin{mmmAbstract}
The manuscript should contain an abstract. The abstract should be self-contained and citation-free and should not exceed 200 words. The
abstract should state the purpose, approach, results and conclusions of the work. The author should assume that the reader has some
knowledge of the subject but has not read the paper. Thus, the abstract should be intelligible and complete in it-self (no numerical references); it should not cite figures, tables, or sections of the paper. The abstract should be written using third person instead of first person.
\vspace{5pt}
\newline
\textbf{Keywords: }{keywords and phrases.} % Write 3-5 keywords
\vspace{5pt}
\noindent
\textbf{2020 Mathematics Subject Classification:} code, code.
\end{mmmAbstract}
\maketitle
\pagestyle{myheadings}%do not change this command
\markboth{Author Names}{Title of article}
\section{Introduction}
This is an example of manuscript in \LaTeX \ in form required by the publisher of the {\em MODERN MATHEMATICAL METHODS}.
\section{Section title} %% Please avoid complex formulas in (sub)titles
This template contains detailed instructions for preparing manuscripts for our journal.
Missing to follow them may cause rejecting of the manuscript without further processing.
So, please read both the source and compiled texts.
Insert your text here. Make sure that it is written in correct English.
If there are subsections, then you may use
\subsection{Subsection title}
You may also use subsubsections (but not more),
but please put a line or two of text between the subsection
and the subsubsection titles.
Proclaims (theorems, propositions,...) should be inserted as follows:
\begin{theorem}
This is an example of Theorem.
\end{theorem}
\begin{proof}
This is an example of proof for a Theorem, Lemma, Corollary and Proposition. Follows an example of enumerated equation
\begin{align}
f'\left( x \right) & = \mathop {\lim }\limits_{h \to 0} \frac{{f\left( {x + h} \right) - f\left( x \right)}}{h}\nonumber\\
& = \mathop {\lim }\limits_{h \to 0} \frac{{{a^{x + h}} - {a^x}}}{h}\nonumber\\
& = \mathop {\lim }\limits_{h \to 0} \frac{{{a^x}{a^h} - {a^x}}}{h}\\
& = \mathop {\lim }\limits_{h \to 0} \frac{{{a^x}\left( {{a^h} - 1} \right)}}{h}
\end{align}
\end{proof}
\begin{proposition}
This is an example of Proposition.
\end{proposition}
\begin{corollary}
This is an example of Corollary.
\end{corollary}
\begin{lemma}
This is an example of Lemma.
\end{lemma}
\section{Main results}
%The command \rm is necessary for type the txet with roman fonts in the Example, Definition and Remark environment.
\begin{example}
This is an example of Example.
\end{example}
\begin{definition}
This is an example of Definition.
\end{definition}
\begin{remark}
This is an example of Remark.
\end{remark}
\begin{question}
This is an example of Question.
\end{question}
\subsection{Numbered list items sample:}
\begin{enumerate}[1.]
\item First level numbered list entry. sample numbered list entry.
\item First numbered list entry. sample numbered list entry. Numbered list entry. sample numbered list entry. Numbered list entry. sample numbered list entry.
\begin{enumerate}[a.]
\item Second level alpabetical list entry. Second level alpabetical list entry. Second level alpabetical list entry~\cite{ACAR1} Second level alpabetical list entry.
\item Second level alpabetical list entry. Second level alpabetical list entry~\cite{ARAL1}.
\begin{enumerate}[ii.]
\item Third level lowercase roman numeral list entry. Third level lowercase roman numeral list entry. Third level lowercase roman numeral list entry.
\item Third level lowercase roman numeral list entry. Third level lowercase roman numeral list entry~\cite{AVS1}.
\end{enumerate}
\item Second level alpabetical list entry. Second level alpabetical list entry.
\end{enumerate}
\item First level numbered list entry. sample numbered list entry. Numbered list entry. sample numbered list entry. Numbered list entry.
\item Another first level numbered list entry. sample numbered list entry. Numbered list entry. sample numbered list entry. Numbered list entry.
\end{enumerate}
\section*{Acknowledgments}
This is acknowledgment text. Provide text here.
\subsection*{Author contributions}
This is an author contribution text.
\subsection*{Financial disclosure}
None reported.
\subsection*{Conflict of interest}
The authors declare no potential conflict of interests.
\section*{Supporting information}
The following supporting information is available as part of the online article:
\begin{thebibliography}{99}
\bibitem{ACAR1} { T. \ Acar, A. \ Aral {\rm and} I. \ Raşa}: \textit{The new forms of Voronovskaya's theorem in weighted spaces}, Positivity, {\bf 20} (1) (2016), 25-40.
\bibitem{AVS1}{F. \ Altomare, V. \ Leonessa {\rm and} S. \ Milella}: \textit{Continuous selections of Borel Measures and Bernstein-Schnabl operators}, Proceedings of the International Conference on Numerical Analysis and Approximation Theory NAAT2006, Cluj-Napoca (Romania) (2007), 1-27.
\bibitem{ARAL1}{A. \ Aral, V. \ Gupta {\rm and} R. P. \ Agarwal}: \textit{Applications of q-calculus in operator theory}, Springer, New York (2013).
\end{thebibliography}
\end{document}