underscore removed from equation

[mwpriddy]

It seems when I write a LaTeX equation that uses and underscore and curly brackets for subscripts, the underscore is removed and the equation does not show up correctly.

For example, if I input something like $ \mathbf{F}_{t+\Delta t}^\mathrm{p} $ the underscore will disappear (when I commit) and it ends up being $ \mathbf{F}{t+\Delta t}^\mathrm{p} $ which does not display correctly.

You can use something like http://cdn.mathjax.org/mathjax/latest/test/sample-dynamic-2.html to check the actual LaTeX portion. I assume this is an error in MathJax or MarkDown, but I am not sure what to do about it. Thoughts?

[tonyfast]

I'll scope this out.

[mwpriddy]

It looks like 2 underscores indicate italics to markdown. So, it overwrites mathjax syntax and converts the text to italic text. For more information:

http://docs.mathjax.org/en/latest/tex.html

I would assume there is a change we can make to either markdown or mathjax, but that is outside of my current understanding. Thoughts?

[tonyfast]

Which document is specifically giving you trouble? So I can have a test.

[mwpriddy]

plastic strain estimation...

[tonyfast]

Possible Fix

Please see if the current version of the post has this problem fixed? I don't know the equations well enough to say one way or another.

I added $$ before each of the equations and I think it cleared up your problem? Please see the changes in the post here.

Equation Numbering

I also added Equation number.

In the Front Matter, if Latex is turned on then you can add autonumber as an option.

latex: true
autonumber: true

You can directly link to equations by adding #mjx-eqn-## to the end of the url.

A link to equation 7 by appending #mjx-eqn-7 to the url.

[mwpriddy]

That fixed it right up! Thanks Tony. And the autonumbering is a great addition.

[tonyfast]

Thanks Matt. Glad you are back on track.