Home > Math > About writing LaTex Formulas online and on WordPress

## About writing LaTex Formulas online and on WordPress

Online LaTex Equation Editor (this is similar to Scientific Workplace)

Latex Lab Project (hosted at Google Code) and LaTex to PDF can help write LaTex codes and compile codes without installing MikTex system on your local computer.

Online instructions and forums:

The codes for the formula $cov(X,Y)=\mathbb{E}\left( cov(X,Y|Z)\right) +cov(\mathbb{E}(X|Z),\mathbb{E}(Y|Z))$ on WordPress.com are

$latex cov(X,Y)=\mathbb{E}\left( cov(X,Y|Z)\right) +cov(\mathbb{E}(X|Z),\mathbb{E}(Y|Z))$

where $latex must stick together without a space. The reason that I separated$ from the word latex is that I want to avoid that formula from being displayed again so that purely codes are shown above.

——– Below is a sample for math articles ——–

\documentclass[12pt]{article}
\usepackage{amssymb}
\usepackage{amsmath}
%%%%%%%%%%%
\usepackage{rotating,hyperref}

\DeclareMathOperator{\lk}{lk}
\newcommand{\chR}{\check{\mathcal{R}}}
\newcommand{\fsl}{\mathfrak{sl}}
\newcommand{\fu}{\mathfrak{u}}

\begin{document}
\title{TTILE……}
\date{}
\maketitle

\begin{abstract}
Blah Blah Blah…
\end{abstract}

\tableofcontents

\section{MY INTRODUCTION}
Blah Blah Blah

\subsection{OVERVIEW}
Blah Blah Blah
\vspace{5pt}
\noindent \textsc{AMS……}
\vspace{10pt}
\noindent \textsc{EMAIL……}

\end{document}

————————————————————

The following is a sample of codes for showing “Page 3 of 20” (for example) at the bottom of the page. It automatically counts the number of pages and shows the current page. The package for showing the last page number is the “lastpage”.

\usepackage{fancyhdr,lastpage}

\pagestyle{fancy}
\fancyfoot{}
\fancyfoot[CE,CO]{Page \thepage \ of \pageref{LastPage}}
\renewcommand{\footrulewidth}{0pt}

————————————————————

\documentclass[12pt]{amsart}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphics}
\usepackage{fullpage}
\theoremstyle{remark}
\include{psfig}
\title{AAA}
\author{AAA}
\date{}
\begin{document}
\maketitle
\begin{center} \small{April 2011} \end{center}
\vspace{13 mm}
\setcounter{tocdepth}{2}
%\tableofcontents
\end{document}
————————————————————

Here is another sample by Harvey Gould.

## LaTeX

### Contents

WordPress.com supports $\LaTeX$, a typesetting system that’s really good at formatting mathematical formulas and equations.

#### Using LaTeX

To include $\LaTeX$ code in your post, use the following:

$latex your-latex-code-here$

So, for example,

$latex i\hbar\frac{\partial}{\partial t}\left|\Psi(t)\right>=H\left|\Psi(t)\right>$

produces

=H\left|\Psi(t)\right>” src=”http://s0.wp.com/latex.php?latex=i%5Chbar%5Cfrac%7B%5Cpartial%7D%7B%5Cpartial+t%7D%5Cleft%7C%5CPsi%28t%29%5Cright%3E%3DH%5Cleft%7C%5CPsi%28t%29%5Cright%3E&bg=ffffff&fg=000&s=0&#8243; alt=”i\hbar\frac{\partial}{\partial t}\left|\Psi(t)\right>=H\left|\Psi(t)\right>” />

#### LaTeX Error

If your $\LaTeX$ code is broken, instead of the equation you’ll see an ugly yellow and red error message. Sorry, we can’t provide support for $\LaTeX$ syntax, but there are plenty of useful guides elsewhere online. Or a quick post in our forums might find you a solution. One thing to keep in mind is that WordPress puts all of your $\LaTeX$ code inside a $\LaTeX$ math environment. If you try to use $\LaTeX$ that doesn’t work inside the math environment (such as \begin{align} ... \end{align}), you will get an error:

#### LaTeX Size

You can change the size of the LaTeX by specifying an s parameter after the $\LaTeX$ code.

$latex \LaTeX&s=X$ , for example,

$latex {x^2 + 2} & s=2$ the result is:

${x^2+2}$

Where X goes from -4 to 4 (0 is the default). These sizes correspond to $\LaTeX$‘s font size commands:

s= font size Example
-4 \tiny $\LaTeX$
-3 \scriptsize $\LaTeX$
-2 \footnotesize $\LaTeX$
-1 \small $\LaTeX$
0 \normalsize (12pt) $\LaTeX$
1 \large $\LaTeX$
2 \Large $\LaTeX$
3 \LARGE $\LaTeX$
4 \huge $\LaTeX$

#### LaTeX Colors

WordPress tries to guess the background and foreground colors of your site and generates the $\LaTeX$image accordingly. But, you can change the colors. You can specify bg and fg parameters after the $\LaTeX$ code to change the background and foreground colors, respectively. The colors must be in hexadecimal RGB format: ffffff for white, 0000ff for bright blue, etc.

$latex \LaTeX&bg=ffcccc&fg=cc00ff&s=4$

$\LaTeX$

#### LaTeX Packages

WordPress.com uses standard $\LaTeX$ with the following packages:

• amsmath
• amsfonts
• amssymb

For more information about $\LaTeX$, you can visit LaTeX documentation site and TeX Resources by American Mathematical Society.