# Enable Obsidian to display multiple-line math equations with double dollar signs directly

### display multiple-line math equations

As a new user, I want to display multiple-line math equations with double dollar signs, as follows

$$a\\ b$$


It is supported in many markdown editors, typora, quiver, leannote…

instead of using align envieronemnt.

### Things I have tried

Following is also not supported.

$a\\ b$


It’s currently supported, are you sure you didn’t forget a dollar sign? Because for me it currently works with this:

$$a\\ b$$


I want to show it with two lines: i.e. ‘a/nb’

but you see

If you want a fraction, it’s like this :

$$\frac{a}{b}$$


thank you. but it is not a fraction, it is an two-line equation

Yes. Both reading view and editing view

PS: OS = MacOS10.15; Obsidian = latest

So I really don’t understand what you’re trying to achieve. Can you show a picture of what you would expect to have ?

Here are two variants for showing multi-line equations using MathJax within Obsidian:

$$\begin{matrix} E = mc^2 \\ a^2 + b^2 = c^2 \end{matrix}$$

Or alternatively, if you want them aligned on the equal sign (or similar):
$$\begin{eqnarray} E &=& mc^2 \\ a^2 + b^2 &=& c^2 \end{eqnarray}$$


These will show as:

Notice the difference in the latter that here they’re aligned on the equal sign ( or more precisely what’s inbetween the ampersands, &, in the text).

If you’re interested, see also mathjax - How to create multi-line equation blocks in GitHub? - Stack Overflow for some more related informations (although I’m not entirely sure all of that applies for the rendition of MathJax that Obsidian implements, but I believe it’s quite close).

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