# How to add Mathematics Subject Classification before keywords in the footnote

I am using amsart. For keywords they have simply the commnad \keywords .It's necessary to add Mathematics Subject Classification followed by the code before I send my paper in the journal. I am posting my preamble below.

I want it look something like this.

\documentclass[12pt,a4paper]{amsart}
\usepackage{amsfonts}
\usepackage{amsthm}
\usepackage{amsmath}
\usepackage{amscd}
\usepackage[latin2]{inputenc}
\usepackage{t1enc}
\usepackage[mathscr]{eucal}
\usepackage{indentfirst}
\usepackage{graphicx}
\usepackage{graphics}
\usepackage{pict2e}
\usepackage{epic}
\numberwithin{equation}{section}
\usepackage
[left=2.7cm,
right=3.0cm,
top=3.5cm,
bottom=4.0cm,]{geometry}
\usepackage{epstopdf}
\def\numset#1{{\\mathbb #1}}

\theoremstyle{plain}
\newtheorem{Th}{Theorem}[section]
\newtheorem{Lemma}[Th]{Lemma}
\newtheorem{Cor}[Th]{Corollary}
\newtheorem{Prop}[Th]{Proposition}

\theoremstyle{definition}
\newtheorem{Def}[Th]{Definition}
\newtheorem{Conj}[Th]{Conjecture}
\newtheorem{Rem}[Th]{Remark}
\newtheorem{?}[Th]{Problem}
\newtheorem{Ex}[Th]{Example}

\newcommand{\im}{\operatorname{im}}
\newcommand{\Hom}{{\rm{Hom}}}
\newcommand{\diam}{{\rm{diam}}}
\newcommand{\ovl}{\overline}
%\newcommand{\M}{\mathbb{M}}

\begin{document}

\title{dddfdgs}

\author{sds Ssdasgh}
\author{Basdishth}

\email{dssdasdsogy@gmail.com}

\begin{abstract} lipsum
\end{abstract}


\keywords{fdgfg}

\maketitle

\section{Introduction} blablbalab

\end{document}


The amsart class supports the \subjclass command precisely for including the MSC code.

Just type in around where you type in the keywords

\subjclass[2000]{53C50, 57R25}


(though probably at this point you should be using the 2010 MSC codes, in which case, look up the correct codes on the AMS website and replace '2000' by '2010' in the line above.)

• can i replace by $2020$ ? Also how to add $key-words$ ? Oct 6, 2020 at 8:29
• Replacing \subclass[2000] by \subclass[2020] produces 1991 classification Oct 6, 2020 at 8:33
• @M.A.SARKAR: what version of the AMS document class are you running? The current release, which is version 2.20.6 2020-05-29, supports 2020 MSC codes (in fact it defaults to the 2020 version). But if you have an older version of the package, it may not. Oct 7, 2020 at 0:16
• For keywords use \keywords; this is the same for most document classes. Oct 7, 2020 at 0:17