# MathJax

MathJax is software for typing formulas
^{[1]}. It uses the Latex style, making the source of the web-article
compatible with style of a scientific journal.

## Dollar

In MathJax, as in Latex, many things are controlled by dollars.
Typing the sign of dollar, id est, \( \\) \(, switches on the mathematics mode;
then, the characters are interpreted as mathematical symbols or as the [[Latex]] commands. If the dollar appears again, it switches the control back to the normal typesetting. In such a way, to type some math and then some plain text, one needs at least two dollars. The results may look like this: \)\int_a^b f(x)\mathrm d x\(.
Typing two dollars at once, id est, \) \\( \\) \(, reserves the special line for the equation.
After to finish this equation, the double-dollar should be repeated again. The result may look as this'"`UNIQ-MathJax2-QINU`"'
=='"`UNIQ--h-1--QINU`"'nomathjax==
In [[Wo]], [[MathJax]] is supported by default.
It can be desactivated with command [[nomathjax]], just type \)<\! \rm nomathjax \!>\(.
After such a command, the dollars loss their usual value
'"`UNIQ--ref-00000002-QINU`"'
and are interpreted as ordinary characters; they can be typed in any amount without any special effect. In such a way, you may print so many dollars as you need.
Then the MathJax can be activated again with command \)<\! \rm /nomathjax \!>$.

After such a command, the dollars get back their normal meaning and ability to switch-on and switch-off the math mode.

Temporal suppressing of MathJax is essential at the including of some code in Latex and/or in PHP, where dollars are important.

## Numbering of formulas

The similarity with Latex appears in the numbering of formulas.
The test of equation references is suggested at http://cdn.mathjax.org/mathjax/latest/test/sample-eqrefs.html
^{[3]}. Similar examples are shown below.

Here is a labeled equation\[f_1(x)=\frac{x+1}{\sqrt{1-x^2}}\label{ref1}\\] it is labeled as "ref1", and here is reference to ref1: \ref{ref1}.

In the similar way, one may label another equation, \(f_2(x)={x+2\over\sqrt{1-x^2}}\label{ref2}\\) it is labeled as "ref2", and here is reference to ref2: \ref{ref2}. The equations should be referred one by one, for example, \ref{ref1}, \ref{ref2}. Attempts to cite them both at once is interpreted as an error \ref{ref1,ref2}, and marked with red.

## Numbering of formulas, again

**Sorry, there is some problem with it**

The similarity with Latex appears in the numbering of formulas.
The test of equation references is suggested at http://cdn.mathjax.org/mathjax/latest/test/sample-eqrefs.html
^{[4]}. Similar examples are shown below.

Here is a labeled equation\[f_1(x)=\frac{x+1}{\sqrt{1-x^2}}\label{eq:ref1} \]

or

\[ f_1(x)=\frac{x+1}{\sqrt{1-x^2}}\label{eq:ref2} \]

or

\( f_1(x)=\frac{x+1}{\sqrt{1-x^2}}\label{eq:ref3} \)

or

$$ f_1(x)=\frac{x+1}{\sqrt{1-x^2}}\label{eq:ref5} $$

it is labeled as "ref1", and here is reference to ref1: \eqref{eq:ref1}.

\refeq{eq:ref1}.

In the similar way, one may label another equation, \(f_2(x)={x+2\over\sqrt{1-x^2}}\label{eq:ref4}\) it is labeled as "ref2", and here is reference to ref2: \eqref{eq:ref4}. The equations should be referred one by one, for example, \ref{ref1}, \ref{ref2}. Attempts to cite them both at once is interpreted as an error \ref{ref1,ref2}, and marked with red.

## References

- ↑
^{1.0}^{1.1}http://www.mathjax.org/ MathJax is an open source JavaScript display engine for mathematics that works in all modern browsers. - ↑ With command \)<\! \rm nomathjax \!>\(, one can easy refute the widely spread concept "
"*Dollar is always Dollar, even in Africa!* - ↑ http://cdn.mathjax.org/mathjax/latest/test/sample-eqrefs.html A test of Equation References.
- ↑ http://cdn.mathjax.org/mathjax/latest/test/sample-eqrefs.html A test of Equation References.