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238 lines
9.7 KiB
Markdown
238 lines
9.7 KiB
Markdown
# MathJax
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## Beautiful math in all browsers
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<a href="http://www.numfocus.org"></a>
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MathJax is an open-source JavaScript display engine for LaTeX, MathML,
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and AsciiMath notation that works in all modern browsers. It was
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designed with the goal of consolidating the recent advances in web
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technologies into a single, definitive, math-on-the-web platform
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supporting the major browsers and operating systems. It requires no
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setup on the part of the user (no plugins to download or software to
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install), so the page author can write web documents that include
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mathematics and be confident that users will be able to view it
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naturally and easily. Simply include MathJax and some mathematics in
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a web page, and MathJax does the rest.
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Some of the main features of MathJax include:
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- High-quality display of LaTeX, MathML, and AsciiMath notation in HTML pages
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- Supported in most browsers with no plug-ins, extra fonts, or special
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setup for the reader
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- Easy for authors, flexible for publishers, extensible for developers
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- Supports math accessibility, cut-and-paste interoperability, and other
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advanced functionality
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- Powerful API for integration with other web applications
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See <http://www.mathjax.org/> for additional details about MathJax,
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and <https://docs.mathjax.org> for the MathJax documentation.
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## MathJax Components
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MathJax version 3 uses files called *components* that contain the
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various MathJax modules that you can include in your web pages or
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access on a server through NodeJS. Some components combine all the
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pieces you need to run MathJax with one or more input formats and a
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particular output format, while other components are pieces that can
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be loaded on demand when needed, or by a configuration that specifies
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the pieces you want to combine in a custom way. For usage
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instructions, see the [MathJax documentation](https://docs.mathjax.org).
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Components provide a convenient packaging of MathJax's modules, but it
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is possible for you to form your own custom components, or to use
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MathJax's modules directly in a node application on a server. There
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are [web examples](https://github.com/mathjax/MathJax-demos-web)
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showing how to use MathJax in web pages and how to build your own
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components, and [node
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examples](https://github.com/mathjax/MathJax-demos-node) illustrating
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how to use components in node applications or call MathJax modules
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directly.
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## What's in this Repository
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This repository contains only the component files for MathJax, not the
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source code for MathJax (which are available in a separate [MathJax
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source repository](https://github.com/mathjax/MathJax-src/)). These
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component files are the ones served by the CDNs that offer MathJax to
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the web. In version 2, the files used on the web were also the source
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files for MathJax, but in version 3, the source files are no longer on
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the CDN, as they are not what are run in the browser.
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The components are stored in the `es5` directory, and are in ES5 format
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for the widest possible compatibility. In the future, we may make an
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`es6` directory containing ES6 versions of the components.
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## Installation and Use
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### Using MathJax components from a CDN on the web
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If you are loading MathJax from a CDN into a web page, there is no
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need to install anything. Simply use a `script` tag that loads
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MathJax from the CDN. E.g.,
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``` html
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<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
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```
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See the [MathJax
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documentation](https://docs.mathjax.org/en/latest/index.html#browser-components),
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the [MathJax Web Demos](https://github.com/mathjax/MathJax-demos-web),
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and the [MathJax Component
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Repository](https://github.com/mathjax/MathJax-demos-web) for more information.
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### Hosting your own copy of the MathJax Components
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If you want to host MathJax from your own server, you can do so by
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installing the `mathjax` package using `npm` and moving the `es5`
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directory to an appropriate location on your server:
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``` bash
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npm install mathjax@3
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mv node_modules/mathjax/es5 <path-to-server-location>/mathjax
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```
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Note that we are still making updates to version 2, so include `@3`
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when you install, since the latest chronological version may not be
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version 3.
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Alternatively, you can get the files via GitHub:
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``` bash
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git clone https://github.com/mathjax/MathJax.git mj-tmp
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mv mj-tmp/es5 <path-to-server-location>/mathjax
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rm -rf mj-tmp
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```
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Then (in either case) you can use a script tag like the following:
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``` html
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<script id="MathJax-script" async src="<url-to-your-site>/mathjax/tex-chtml.js"></script>
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```
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where `<url-to-your-site>` is replaced by the URL to the location
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where you moved the MathJax files above.
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See the
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[documentation](https://docs.mathjax.org/en/latest/web/hosting.html)
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for details.
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### Using MathJax components in a node application
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To use MathJax components in a node application, install the `mathjax` package:
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``` bash
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npm install mathjax@3
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```
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(we are still making updates to version 2, so you should include `@3`
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since the latest chronological version may not be version 3).
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Then require `mathjax` within your application:
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```js
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require('mathjax').init({ ... }).then((MathJax) => { ... });
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```
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where the first `{ ... }` is a MathJax configuration, and the second
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`{ ... }` is the code to run after MathJax has been loaded. E.g.
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```js
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require('mathjax').init({
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loader: {load: ['input/tex', 'output/svg']}
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}).then((MathJax) => {
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const svg = MathJax.tex2svg('\\frac{1}{x^2-1}', {display: true});
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console.log(MathJax.startup.adaptor.outerHTML(svg));
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}).catch((err) => console.log(err.message));
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```
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**Note:** this technique is for node-based application only, not for
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browser applications. This method sets up an alternative DOM
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implementation, which you don't need in the browser, and tells MathJax
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to use node's `require()` command to load external modules. This
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setup will not work properly in the browser, even if you webpack it or
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bundle it in other ways.
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See the
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[documentation](https://docs.mathjax.org/en/latest/index.html#server-nodejs)
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and the [MathJax Node
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Repository](https://github.com/mathjax/MathJax-demos-node) for more details.
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## Reducing the Size of the Components Directory
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Since the `es5` directory contains *all* the component files, so if
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you are only planning one use one configuration, you can reduce the
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size of the MathJax directory by removing unused components. For
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example, if you are using the `tex-chtml.js` component, then you can
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remove the `tex-mml-chtml.js`, `tex-svg.js`, `tex-mml-svg.js`,
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`tex-chtml-full.js`, and `tex-svg-full.js` configurations, which will
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save considerable space. Indeed, you should be able to remove
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everything other than `tex-chtml.js`, and the `input/tex/extensions`,
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`output/chtml/fonts/woff-v2`, `adaptors`, `a11y`, and `sre`
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directories. If you are using the results only on the web, you can
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remove `adaptors` as well.
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If you are not using A11Y support (e.g., speech generation, or
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semantic enrichment), then you can remove `a11y` and `sre` as well
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(though in this case you may need to disable the assistive tools in
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the MathJax contextual menu in order to avoid MathJax trying to load
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them when they aren't there).
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If you are using SVG rather than CommonHTML output (e.g., `tex-svg.js`
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rather than `tex-chtml.js`), you can remove the
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`output/chtml/fonts/woff-v2` directory. If you are using MathML input
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rather than TeX (e.g., `mml-chtml.js` rather than `tex-chtml.js`),
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then you can remove `input/tex/extensions` as well.
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## The Component Files and Pull Requests
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The `es5` directory is generated automatically from the contents of the
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MathJax source repository. You can rebuild the components using the
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command
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``` bash
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npm run make-es5 --silent
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```
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Note that since the contents of this repository are generated
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automatically, you should not submit pull requests that modify the
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contents of the `es5` directory. If you wish to submit a modification
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to MathJax, you should make a pull request in the [MathJax source
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repository](https://github.com/mathjax/MathJax-src).
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## MathJax Community
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The main MathJax website is <http://www.mathjax.org>, and it includes
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announcements and other important information. A [MathJax user
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forum](http://groups.google.com/group/mathjax-users) for asking
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questions and getting assistance is hosted at Google, and the [MathJax
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bug tracker](https://github.com/mathjax/MathJax/issues) is hosted
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at GitHub.
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Before reporting a bug, please check that it has not already been
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reported. Also, please use the bug tracker (rather than the help
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forum) for reporting bugs, and use the user's forum (rather than the
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bug tracker) for questions about how to use MathJax.
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## MathJax Resources
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* [MathJax Documentation](https://docs.mathjax.org)
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* [MathJax Components](https://github.com/mathjax/MathJax)
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* [MathJax Source Code](https://github.com/mathjax/MathJax-src)
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* [MathJax Web Examples](https://github.com/mathjax/MathJax-demos-web)
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* [MathJax Node Examples](https://github.com/mathjax/MathJax-demos-node)
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* [MathJax Bug Tracker](https://github.com/mathjax/MathJax/issues)
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* [MathJax Users' Group](http://groups.google.com/group/mathjax-users)
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