# aligned equations

#### brock

16 Jul, 2017 03:23 PM

hi
I'm trying to use Marked 2 with TextMate. I find that

\begin{align*} \vec{F}C &= m\vec{a}C \ \vec{F}_C &=m\frac{v2}{R} \label{centf} \end{align*}

It spits back the math block as above and strips the * BTW.

which happily works in any browser and MacDown and other markdown tools, doesn't render with any of the MathJax selections available in Marked. I must be doing something wrong?

thanks!

1. Support Staff Posted by Brett on 16 Jul, 2017 07:21 PM

You may need to look at the additional MathJax configuration. The $$separator isn't always recognized by default. http://marked2app.com/help/MathJax.html#additionalmathjaxconfiguration Let me know if that helps. Thanks, Brett 2. Posted by brock on 16 Jul, 2017 08:09 PM hi hmm. Thanks. I tried that actually. I think that just plain$$ works, but it’s the embedding within it of the latex environment that seems to confuse it.

I’ve not seen this behavior before with “all-in-one” markdown tools like Atom, MacDown, etc. So there’s something unusual in the MathJax implementation I think. It renders properly in a browser with a stock preamble MathJax setup.

I don’t know what all of the different choices are inside of Marked but I tried all of the MathJax versions.

thanks
Ray

On Jul 16, 2017, at 3:21 PM, Brett <[email blocked]<mailto:[email blocked]>> wrote:

3. Support Staff Posted by Brett on 18 Jul, 2017 05:27 PM

First, are you certain the custom processor (pandoc) is working? There would be a green "light" icon at the bottom right of the preview window. For me, with the TeX-AMS-MML_HTMLorMML-full configuration, it works as is with both the built-in MultiMarkdown or with Pandoc as a custom processor.

4. Posted by brock on 18 Jul, 2017 07:00 PM

hi
Thanks, but no, I’m not sure that pandoc is working. I can make multimarkdown be respected and get the green light, but it fails. I’ve attached screen shots. Notice that multimarkdown fails for inaccessibility to the binary. Yes, I have the apple store version.

There’s also that strange “pipe” like vertical line at the end of each.

This renders fine in a browser.

Ray

[cid:2EDDF773-B08F-4DB3-9E9F-90A7278FAE6C]

[cid:879DDD58-65BB-4F60-9B59-3BFA32C3F722]

[cid:21B918DD-2853-4DAB-8D01-F2D66753978B]

[cid:21A9EA77-24F5-48D0-B4F5-C7D9814ED312]

[cid:C53BD9CC-D358-4B62-8BAB-DD86C0AE0A2D]

On Jul 18, 2017, at 1:27 PM, Brett <[email blocked]<mailto:[email blocked]>> wrote:

5. Support Staff Posted by Brett on 18 Jul, 2017 07:50 PM

I'm sending you a cross-grade license via email. You'll need the direct version to run pandoc. We'll take another look after you try it with that version.

Regarding the line on the right, it's a known issue fixed in the next update.

6. Posted by brock on 18 Jul, 2017 08:27 PM

hi
Thanks. But same results for pandoc and for multimarkdown…no complaints from the processor and green lights for both.

But it’s something to do with the align environment maybe.

Putting them together, we then find:

\begin{align*} F &=ma \\ E &=mc^2 \end{align*}

\begin{align} F &=ma \\ E &=mc^2 \end{align}

\begin{aligned} F &=ma \\ E &=mc^2 \end{aligned}

$$\begin{eqnarray*} F &=ma \\ E &=mc^2 \end{eqnarray*}$$

$$\begin{eqnarray} F &=& ma \\ E &=& mc^2 \end{eqnarray}$$

Three ways I know of to align equations. The last two are oldest, but frowned upon. The top two I think are in the AMS package, which I assume that the MathJax Marked 2 uses deploys?

Anyhow attached are the results. Where nothing works, it’s from multimarkdown. Where everyone lines up, it’s pandoc.

However I found the problem and it’s strange:

\begin{align*} \Delta p_{A} &= - \Delta p_{B} \\ p_{A} - p_{A,0} &= - (p_{B} - p_{B,0}) \;\;\;\;\;\;\;\text{ rearrange these terms...} \\ p_{A,0} + p_{B,0} &= p_{A} + p_{B} \tag{pcon}\label{pcon} \end{align*}

does not work, while:

\begin{align*} \Delta p_{A} &= - \Delta p_{B} \\ p_{A} - p_{A,0} &= - (p_{B} - p_{B,0}) \;\;\;\;\;\;\;\text{ rearrange these terms...} \\ p_{A,0} + p_{B,0} &= p_{A} + p_{B} \tag{pcon}\label{pcon} \end{align*}

does work.

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