susam/mathb

Share mathematics on the web with LaTeX and Markdown

mathb's Issues

Toggle dark mode?

Thanks for this pastebin, that's super useful!

One question I had is, is there a way I can turn off dark mode?

Save and get URL not working

When I want to save some writings, an error occurs:

Post failed due to the following error:

Could not open /home/susam/www/mathb-content/59.txt for writing

This happens since two weeks ago and is still happening today, if I remember correctly. Seems like a server problem?

Behave nicely when printing the page and provide a print preview

Currently when printing the page, you get all the MathB.in header/footer as well as two columns, one with code and one with the math content.

I think it would be nice if only the math content were printed. In other words, if you could get something similar to what you would get if you ran LaTeX over the document and printed the result.

Rendering error without any plausible reason

The following text produce, on Save & Get URL, the following error message

ERROR: Improper code!

The text of the markdown is the following

### Review of
# Heat flow influence on the Cauchy stress tensor in a thermal wave
### by A.Y. Beliaev, L.A. Komar and A.L. Svistkov

In this manuscript the authors investigate, by mean of Rational Thermoelasticity, the possibility that internal energy density or entropy density depends on heat flux, but not both. For the heat flux is considered a costant relaxing time depending on the material. Moreover, the dependence of the Cauchy stress tensor on heat flux is considered.

1. First of all, I suppose that with the expression "mass density of the internal energy" the authors intend "density of the internal energy per unit mass". I suggest to use this second form that in my opinion is more correct. The same can be applied to the expression "mass density of the entropy".
2. this is the second point

In the tutorial, the text column shows doubled backslashes where only one should be.

The first paragraph of the tutorial explains how to input inline math. The input window shows the correct code but in the "text" output, backslashes are doubled. The problem persists throughout.

I've encountered this problem elsewhere, and it's lethal when trying to explain (La)TeX conventions. Unfortunately, I have no idea how to fix the problem, but unless it is fixed, someone trying to learn from this is likely to become confused unnecessarily.

Include numerical calculations

Hi, just and Idea

What about a notation to do numerical calculations

# How to add numbers

To add two numbers like $ a + b $ you just add them like $ 2 + 2 $ equals $@ 2 + 2 @$

It can also work with other numbers
@@
a = 2;
b = 3;
@@
$$
\begin{align}
a &= @a@ \\
b &= @b@ \\
a + b &= @a+b@
\end{align}
$$

https://mathb.in/75890

Everything in between @ and @@ would evaluate numerically. Even if it is also in between $

It would evaluate and be similar to

How to add numbers

To add two numbers like $a + b$ you just add them like $2 + 2$ equals $4$

It can also work with other numbers

$$\begin{align} a &= 2 \\ b &= 3 \\ a + b &= 5 \end{align}$$

I've been working on something similar just as a reference https://dvd101x.github.io/math-notepad/

Fatal error - Interface not found

I installed app including the thirdparty software and upon launching mathbin.php, I have got

Fatal error: Interface 'Michelf\MarkdownInterface' not found in /home/bok/WWW/mathb/thirdparty/php-markdown/Michelf/Markdown.php on line 20

By searching the term in Google, I have found out that this error comes up in many error logs. But I haven't found any solution. Where is the problem?

Secret URL Learn More link is broken.

Similar to the tutorial link breaking, this link gives an error: http://mathb.in/4

Refuses to render sometimes with valid LaTeX

http://mathb.in/39606

URLs not rendered

None of the following Markdown styles seems to work.

Code textarea should be larger and move when scrolling

When writing a long document, such as http://mathb.in/1, you can no longer see the bottom of the content as you write, because the textarea sits at the top of the page while the new content is previewed below the visible window area.

It would be much better if:

1. The code textarea expanded to fill as much space as possible inside the window.
2. The code form including the textarea moved with the window

That way, as you scrolled down a long page, the textarea would move with it and always be as large as possible (until reaching the top or bottom where it would need to be a bit shorter).

Problems rendering side-by-side underbrace

The input $\underbrace{123}_{123}\underbrace{123}_{123}$ doesn't render correctly on mathb.in as shown here.

However, on another MathJax rendering site, it works fine

Option to save content as PDF

Not sure if this is possible, but it would be great to be able to download a PDF of the math content. Perhaps with a "download PDF" link?

I realise this would require a lot of work with jsPDF or similar, but it's a nice idea for the future.

Doesn't understand bcancel.

Text area Resize

The text area for the code can be dragged outside of div#form (dragging right, ontop of the div#sheet/div#outputcode. Once it leaves it can never come back!

Error: improper code

• Browser: Supermium 118 (Chromium based)
• Text to paste:

  Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam eu sem placerat, dapibus massa eu, consectetur orci. Fusce ultrices blandit ante a ullamcorper. Phasellus pellentesque est sed ligula bibendum, ac lobortis enim sollicitudin. Nunc tincidunt leo in sapien tincidunt volutpat. Vestibulum metus lectus, rutrum non arcu a, molestie rhoncus metus. Etiam ornare dolor mauris, et scelerisque urna pharetra ac. Aenean feugiat porta nulla eu tristique. Aliquam sed elit auctor, dignissim neque hendrerit, finibus ipsum. Interdum et malesuada fames ac ante ipsum primis in faucibus.

• Save and get URL
• ERROR: Improper code!

Why?

Visual artifacts in Chrome

This is actually a bug from MathJax, and it has been fixed in newer vesions, so simply updating the version that mathb.in uses should solve the bug.

I can't find the license

The end of the README says that there's a LICENSE.md somewhere, but I can't find one from the repo. The README also says "please visit <a link> to obtain a copy of the license", but the link brings me to a mathb.in page saying "This post does not exist."

Problem rendering part of demo page

http://mathb.in/1

At the bottom, for

When this is combined with \eqref{summation} we obtain \eqref{theorem}.

it returns

When this is combined with (???) we obtain (???).

My suspicion is something changed with MathJax and it was updated on the main site, but this line was overlooked or forgotten about or was like that, to begin with.

Needs MathJax 2, not the 3 that it grabs from the git clone

As soon as I cloned the current version of MathJax 2.7.9 which was released on August 25th, 2020, everything worked properly.

https://github.com/mathjax/MathJax/releases/tag/2.7.9

Download, extract to the "thirdparty" directory, rename the directory you extracted to just "MathJax" and not with the version number.

Need to download "pagedown" manually

Since it's hosted on Google Code, which is now in a frozen archived state, download it from there and extract to "thirdparty" directory, and make sure the directory you just extracted is named "pagedown".

https://code.google.com/archive/p/pagedown/source/default/source

There may be newer forks or releases of pagedown that are maintained, but I don't know which would be supported.

\textbf

In my opinion, it should not be required to surround \textbf by dollars symbols ($) in order to get the text formatted. Just to make it easier to copy and paste from my latex files.

Integral symbol is rendered incorrectly in Firefox

Hi,

It seems to me that integral signs are rendered to small in Firefox. For example, this snippet: http://mathb.in/17534 results in the following:
http://venemo.net/owncloud/public.php?service=files&t=4019eefbc365c09d459f31919b154973

I'm not sure if this is an issue with mathb or mathjax, but thought it's worth reporting.

Does not compile

$T^*_{ij} = \overline{T_{ji}}$ does not compile.

$T_{ij} = \overline{T_{ji}}$ does compile.

Please support OCSP stapling, DNSSEC, and DANE if possible

Hi,
These are all three modern privacy and security technologies. Could you look into enabling them? Let me know how I can help.

suggestion about add expiration to url

be like ubuntu paste, add a expiration to shared url, escpecially for programmerd have a neat-code habit.

Tutorial link is broken

Accessing this page just gives an error. http://mathb.in/2

This post does not exist.

Support linear logic

It would be nice if mathbin supported the symbols for linear logic, provided by the package cmll. (Or let the user use \usepackage to load whatever package they want.)

EDIT: Hmm, seems like there's no straightforward way to do any of those things with MathJax. 😞

My IP is blacklisted

I am very sorry, but my IP is blacklisted. Can I use the project? May be I created too many pages or something like this? I am a teacher and I use your resourse for my online classes. It was really helpful.
Yours, Yulia.