Scientific Word

[Picture]
[Picture]

\documentclass{article}%  
\usepackage{amsmath}%  
\setcounter{MaxMatrixCols}{30}%  
\usepackage{amsfonts}%  
\usepackage{amssymb}%  
\usepackage{graphicx}  
%TCIDATA{OutputFilter=latex2.dll}  
%TCIDATA{Version=5.00.0.2570}  
%TCIDATA{CSTFile=40 LaTeX article.cst}  
%TCIDATA{Created=Wednesday, September 01, 2004 23:06:23}  
%TCIDATA{LastRevised=Wednesday, September 01, 2004 23:35:57}  
%TCIDATA{<META NAME="GraphicsSave" CONTENT="32">}  
%TCIDATA{<META NAME="SaveForMode" CONTENT="1">}  
%TCIDATA{<META NAME="DocumentShell" CONTENT="Standard LaTeX\Blank - Standard LaTeX Article">}  
\newtheorem{theorem}{Theorem}  
\newtheorem{acknowledgement}[theorem]{Acknowledgement}  
\newtheorem{algorithm}[theorem]{Algorithm}  
\newtheorem{axiom}[theorem]{Axiom}  
\newtheorem{case}[theorem]{Case}  
\newtheorem{claim}[theorem]{Claim}  
\newtheorem{conclusion}[theorem]{Conclusion}  
\newtheorem{condition}[theorem]{Condition}  
\newtheorem{conjecture}[theorem]{Conjecture}  
\newtheorem{corollary}[theorem]{Corollary}  
\newtheorem{criterion}[theorem]{Criterion}  
\newtheorem{definition}[theorem]{Definition}  
\newtheorem{example}[theorem]{Example}  
\newtheorem{exercise}[theorem]{Exercise}  
\newtheorem{lemma}[theorem]{Lemma}  
\newtheorem{notation}[theorem]{Notation}  
\newtheorem{problem}[theorem]{Problem}  
\newtheorem{proposition}[theorem]{Proposition}  
\newtheorem{remark}[theorem]{Remark}  
\newtheorem{solution}[theorem]{Solution}  
\newtheorem{summary}[theorem]{Summary}  
\newenvironment{proof}[1][Proof]{\noindent\textbf{#1.} }{\ \rule{0.5em}{0.5em}}  
\begin{document}  
Hello World! $\frac{\sqrt[2]{a^{2}+b^{2}}}{2}$  
\end{document}  

19, next, prev, up, toc