History: MathJax

            {syntax type="markdown"  editor="wysiwyg"} # MathJax

"MathJax is a cross-browser JavaScript library that displays mathematical equations in web browsers, using LaTeX math and MathML markup. MathJax is released as open-source software under the Apache license." 
Source: http://en.wikipedia.org/wiki/MathJax

## Tiki20+

Native support was added via https://sourceforge.net/p/tikiwiki/code/68624 and should appear here: https://packages.tiki.org/

## Before Tiki 20


Add the following line to tiki-admin.php -> Look and Feel -> Custom HTML

 Content: {CODE(caption="To include in all pages" colors="htmlmixed")}
<script type="text/javascript"
  src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
</script>
{CODE}

{CODE(caption="To include only in one page (choose your own page name)" colors="htmlmixed")}
{if $page eq 'MathJax'}
<script type="text/javascript"
  src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
</script>
{/if}
{CODE}

{BOX()}The other possibility (working in http and https) is to install (copy) the MathJax locally 
as described at: http://docs.mathjax.org/en/latest/installation.html 
for example to "./add_mathjax" directory 
and add to tiki-admin.php -> Look and Feel -> Custom HTML

 Content: {CODE(caption="For local instalation" colors="htmlmixed")}<script type="text/javascript"
src="./add_mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
</script>{CODE} 
{BOX}

Then, just use math in your page using ((PluginHTML)). It will sometimes work without that but there can be conflicts with wiki syntax or other code. Click [tiki-pagehistory.php?page=MathJax&amp;source=0|here] to see the source of the current wiki page for an example.

 **Nice presentation won't load just after you save a page. So after saving, go to another page, and click back to your page**

Below are math samples copied from http://www.mathjax.org/demos/tex-samples/. Right-click on the formulae for more options.

## The Lorenz Equations

{HTML()}
\[\begin{aligned}
\dot{x} &amp; = \sigma(y-x) \\
\dot{y} &amp; = \rho x - y - xz \\
\dot{z} &amp; = -\beta z + xy
\end{aligned} \]
{HTML}

## The Cauchy-Schwarz Inequality

{HTML()}
\[ \left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right) \]
{HTML}

## A Cross Product Formula

{HTML()}
\[\mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}
\mathbf{i} &amp; \mathbf{j} &amp; \mathbf{k} \\
\frac{\partial X}{\partial u} &amp;  \frac{\partial Y}{\partial u} &amp; 0 \\
\frac{\partial X}{\partial v} &amp;  \frac{\partial Y}{\partial v} &amp; 0
\end{vmatrix}  \]
{HTML}

## The probability of getting \\(k\\) heads when flipping \\(n\\) coins is

{HTML()}
\[P(E)   = {n \choose k} p^k (1-p)^{ n-k} \]
{HTML}

## An Identity of Ramanujan

{HTML()}
\[ \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} =
1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}}
{1+\frac{e^{-8\pi}} {1+\ldots} } } } \]
{HTML}

## A Rogers-Ramanujan Identity

{HTML()}
\[  1 +  \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots =
\prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})},
\quad\quad \text{for $|q|&lt;1$}. \]
{HTML}

## Maxwell's Equations

{HTML()}
\[  \begin{aligned}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &amp; = \frac{4\pi}{c}\vec{\mathbf{j}} \\   \nabla \cdot \vec{\mathbf{E}} &amp; = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} &amp; = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} &amp; = 0 \end{aligned}
\]
{HTML}

# Related links

- https://groups.google.com/forum/?fromgroups=#!topic/mathjax-users/-AP8s7AVpLo