LineBreak Mathjax 3.2

[MarcS]

Hello everyone.

I updated Mathjax 2.7 to version 3.2.
I've read that command line break "\\"  is not implemented yet.
https://docs.mathjax.org/en/latest/output/linebreaks.html

I have so many formulas with command \\ and was wondering if is there any work around to solve it.
Which command should I use for line breaking in 3.2 ?

Thank you so much !

[Davide Cervone]

Just to be clear, the usage of `\\` that is not implemented is `\\` as a forced line break in what would otherwise be a single displayed equation.  The usage of `\\` as a break in arrays, alignment environments, and so on is implemented.  If you are using \\ to force line breaks, you can use

\displaylines{

   ... \\

   ... \\

}

to produce the separate lines.  It would be possible to make a TeX input pre-filter to insert the `\displaylines{` and `}` automatically, I would think.

Davide

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[MarcS]

Thank you so much for response. 
I really appreciate it.

This is an example of a formula we using \\ to force line break.
In that case how it would be the usage of \displaylines ?
Thanks again !

  $tekbegininline$\dfrac{5+3\sqrt{2}}{5-3\sqrt{2}}=\dfrac{5+3\sqrt{2}}{5-3\sqrt{2}}\cdot\dfrac{5+3\sqrt{2}}{5+3\sqrt{2}}=\dfrac{(5+3\sqrt{2})^{\scriptstyle{2}}}{5^{\scriptstyle{2}}-(3\sqrt{2})^{\scriptstyle{2}}}=\dfrac{25+2\cdot5\cdot3\sqrt{2}+(3\sqrt{2})^{\scriptstyle{2}}}{5^{\scriptstyle{2}}-(3\sqrt{2})^{\scriptstyle{2}}}=\dfrac{25+30\sqrt{2}+9\cdot2}{25-9\cdot2}=\\=\dfrac{25+30\sqrt{2}+18}{25-18}=\dfrac{43+30\sqrt{2}}{7}$tekendinline$  

[Davide Cervone]

Use

\displaylines{

\dfrac{5+3\sqrt{2}}{5-3\sqrt{2}}=\dfrac{5+3\sqrt{2}}{5-3\sqrt{2}}\cdot\dfrac{5+3\sqrt{2}}{5+3\sqrt{2}}=\dfrac{(5+3\sqrt{2})^{\scriptstyle{2}}}{5^{\scriptstyle{2}}-(3\sqrt{2})^{\scriptstyle{2}}}=\dfrac{25+2\cdot5\cdot3\sqrt{2}+(3\sqrt{2})^{\scriptstyle{2}}}{5^{\scriptstyle{2}}-(3\sqrt{2})^{\scriptstyle{2}}}=\dfrac{25+30\sqrt{2}+9\cdot2}{25-9\cdot2}=\\=\dfrac{25+30\sqrt{2}+18}{25-18}=\dfrac{43+30\sqrt{2}}{7}

}

to do it.

Davide

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[MarcS]

it worked !

I used a prefilter to add displayline

MathJax.startup.document.inputJax[0].preFilters.add((data) => {
if (!data.math.display) {
data.math.math = '\\displaylines{' + data.math.math + '}';
}
});

Thank you so much !