```tex
\documentclass[a4paper,11pt,twoside]{article}
\usepackage{fancyhdr}
\usepackage{verbatim}
\usepackage{indentfirst} % primul paragraf din fiecare sectiune va fi indentat
\usepackage[english]{babel}
\usepackage{epsfig}
%\usepackage{eucal}
%\usepackage{mathptmx}
\usepackage{longtable}
\usepackage{caption}
\usepackage{hanging}
\usepackage{pifont}
\usepackage{wrapfig}
% The final heading of the journal will be slightly different. Do not modify these lines.
\fancypagestyle{plain}
{\small INTERNATIONAL}
%\renewcommand{\headrulewidth}{0.1pt}
\begin{document}
\title{User}
% Attention to capitalization of first letter in title
\author{Shao} % Attention to the initials of first name
\date{}%must be empty
\maketitle
{\small
%Signature
\begin{abstract}
In order to
{\bf Keywords:} tag recommendation
\end{abstract}
}
\section{Introduction}
As a new
\section{The overall framework}
will be conducted.
\subsection{Layer 1 algorithm structure}
In the first layer algorithm
\begin{equation}
L_i=\{(l_{i1}:f'_{l_{i1}}),(l_{i2}:f'_{l_{i2}}),...,(l_{ie}:f'_{l_{ie}})\}\label{equation:6}
\end{equation}
\end{document}
```
这是出错的公式,请问大佬们如何解决
作者追问:2019-10-14 23:26
作者追问:2019-10-14 23:26
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