\usepackage{amsthm,amssymb,amsmath}
\usepackage{pstricks}
\usepackage{pstricks-add}
\usepackage{xecolour}
\usepackage{colortbl}
\usepackage{enumerate}
\usepackage{xepersian}

\newtheorem{thorem}{قضیه}[chapter]
\newenvironment{thorema}{\begin{thorem}  \rm}{\hfill $\Box$ \end{thorem} \par}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\\
\newtheorem{natigea}{نتیجه}[chapter]
\newenvironment{natige}{\begin{natigea}  \rm}{\hfill $\Box$\end{natigea}\par   }
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newtheorem{difinitiona}{\bf تعریف}[chapter]
\newenvironment{difinition}{\begin{difinitiona} \rm }{\hfill $\Box$\end{difinitiona}\par }
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newenvironment{esbat}{\par \noindent\bf اثبات : \rm}{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\contentsname{فهرست}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newtheorem{mesal}{ \hspace*{-3mm} مثال}[chapter]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newenvironment{mesalb}{\begin{mesal}  \rm}{\hfill $\Box$  \end{mesal}\par\ }
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newenvironment{pasokh}{\par\noindent {\large حل : }}{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\bna{\begin{natige}}
\def\ena{\end{natige}}
\def\bta{\begin{difinition}}
\def\eta{\end{difinition}}
\def\bha{\begin{pasokh}}
\def\eha{\end{pasokh}}
\def\bte{\begin{thorema}}
\def\ete{\end{thorema}}
\def\bme{\begin{mesalb}}
\def\eme{\end{mesalb}}
\def\bes{\begin{esbat}}
\def\ees{\end{esbat}}
\newcommand{\bt}{\begin{tabular}}
\newcommand{\et}{\end{tabular}}
\newcommand{\ii}[1] {\int\!\!\!\!\!\int\limits_{\!\!\!\!#1}}
\newcommand{\ik}[1] {\int\!\!\!\int\limits_{\!\!\!\!#1}}
\newcommand{\iin}[4] {\int_#1^#2\!\!\!\int_#3^#4}
\newcommand{\inn}[2] {\int_#1^#2}
\newcommand{\norm}[1]{\|#1\|}
\newcommand{\had}[2]{\lim_{x\to#1}#2} 
\newcommand{\ham}[1]{\lim_{x\to\infty}#1} 
\newcommand{\han}[1]{\lim_{x\to-\infty}#1} 
\newcommand{\dhn}[1]{\dis{\lim_{x\to-\infty}#1}} 
\newcommand{\dhm}[1]{\dis{\lim_{x\to\infty}#1}} 
\newcommand{\dhd}[2]{\dis{\lim_{x\to#1}#2}} 
\newcommand{\mo}{^c} 
\def\ham{\equiv}
\def\dis{\displaystyle}
\def\chii{\raise.5mm\hbox{$\chi$}}
\def\beq{\begin{eqnarray*}}
\def\eeq{\end{eqnarray*}}
\def\lhde{\triangleleft}
\def\le{\leqslant}
\def\dar{\times}
\def\ge{\geqslant}
\def\fee{\varphi} 
\def\fr{\framebox}
\def\r{\rightarrow}
\def\pa{\partial}
\def\tr{\triangledown}
\def\ls{\leqslant}
\def\gs{\geqslant}
\def\zi{\subseteq}
\def\zia{\subset}
\newcommand{\bor}[1] {\stackrel{\longrightarrow}{#1}}
\newcommand{\jam}[2]{\sum_{#1}^{#2}}
\def\nat{\Rightarrow}
\def\lo{\longrightarrow}
\def\natn{\Leftrightarrow}
\def\eps{\varepsilon}
\def\del{\delta} 
\def\bc{\begin{center}}
\def\ec{\end{center}}
\def\tag{\thickapprox}
\def\ba{\begin{array}}
\def\ea{\end{array}}
\def\be{\begin{enumerate}}
\def\ee{\end{enumerate}}
\def\ya{\vee}
\def\va{\wedge}
\def\Bbb{\mathbb}
\setlength\fboxsep{3mm}
\def\foo{\footnotesize}
\newcounter{ali}[section]
\newcommand{\she}[1]{\refstepcounter{ali}
\label{#1}{\scriptsize\mbox{
شکل
}}\ref{#1}}
\newcounter{alii}[section]
\newcommand{\sho}[1]{\refstepcounter{alii}
\label{#1}\ref{#1}}
 \def\tohi{\varnothing}
\def\Rr{{\cal R}}
\def\Tt{{\cal T}}
\def\Ss{{\cal S}}
\def\Aa{{\cal A}}
\def\Bb{{\cal B}}
\def\Gg{{\cal G}}
\def\Ff{{\cal F}}
\def\nto{\leftarrow}
\def\da{\mbox{ Int}}
\def\ka{\mbox{ Ext}}
\def\ma{\partial}
\newcommand{\bast}[1]{\overline{#1}}