Latex使用记事（1）

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	content...
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 　　\# \$ \% \^{} \& \_ \{ \} \~ \\
 　　$\backslash$ 
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	\ldots when Einstein introduced his formula\\
	...
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	\begin{equation} e =  m \cdot c^2 \end{equation} 
	which is at the same time the most widely known and the least well understood physical formula.
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	\begin{equation} \sum_{k=1}^{n} I_k = 0  \end{equation}
	Kirchhoff’s voltage law can be derive \ldots
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\documentclass{article}
\begin{document}
	\today
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\documentclass{article}
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	‘‘Please press the ‘x’ key.’’ \\
	\\
	``asdf'''
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	--------------------------
	\LaTeX
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	http://www.rich.edu/\~{}bush \\ 
	http://www.clever.edu/$\sim$demo\\
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	It’s $-30\,^{\circ}\mathrm{C}$. 
　　　　　sm\o rrebr\o d, !‘Se\~norita!,\\
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\usepackage{textcomp}
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	\texteuro
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	Not shelfful\\
	but shelf\mbox{}ful\\
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	\section{Some Interesting Words} 
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	Footnotes\footnote{This is a footnote.} 
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	\textit{You can also \emph{emphasize} text if it is set in italics,}\\
	\emph{emphasize}
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	\begin{enumerate} 
		\item You can mix the list environments to your taste: 
		\begin{itemize} \item But it might start to look silly. \item[-] With a dash. \end{itemize} 
		\item Therefore remember:
		 
		\begin{description} 
			\item[Stupid] things will not become smart because they are in a list. 
			\item[Smart] things, though, can be presented beautifully in a list. 
		\end{description} 
	\end{enumerate}
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	\begin{flushright} This text is right-\\aligned. \LaTeX{} is not trying to make each line the same length.
	\end{flushright}
　　　　　\begin{center} At the centre\\of the earth \end{center}
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	\begin{abstract} The abstract abstract. \end{abstract}
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\documentclass{article}
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\begin{verbatim} 
   10 PRINT "HELLO WORLD ";
      20 GOTO 10 \end{verbatim}
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\begin{tabular}{|p{4.7cm}|} \hline Welcome to Boxy’s paragraph. We sincerely hope you’ll all enjoy the show.\\ \hline 
\end{tabular}\\
\\\\
\\
\begin{tabular}{l} \hline leading space left and right\\ \hline \end{tabular}
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	1\\
	[122pt] 100~m$^{3}$ of water\\
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 \(\tau  \epsilon  \)\\
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\begin{displaymath} \lim_{n \to \infty} \sum_{k=1}^n \frac{1}{k^2} = \frac{\pi^2}{6} \end{displaymath}

\begin{equation} x^{2} \geq 0\qquad \textrm{for all }x\in\mathbf{R} \end{equation}
\begin{equation} a^x+y \neq a^{x+y} \end{equation}

\[\lim_{x \rightarrow 0} \frac{\sin x}{x}=1\]
\begin{displaymath} \mathbf{X} = \left( \begin{array}{ccc} x_{11} & x_{12} & \ldots \\ x_{21} & x_{22} & \ldots \\ \vdots & \vdots & \ddots \end{array} \right) \end{displaymath}

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