Troubleshooting a Weird LaTex Bug

[Math Jeans]

I'm getting this weird LaTex bug that is really messing with my posts.

Sometimes when I use the tex tags, I get this weird problem that no matter what I put inside them, the post will always display the a certain equation inside of the tags.

For example:

I am trying to edit my signature (writing my name in greek letters), however, no matter what I put inside the tags (anything at all), the only thing that will come up as a result of my tex tags will be:

$$\rho=\sqrt{4az_0}$$

The problem is on/off (for example I don't seem to be having the problem with this particular post), however, when it ocurrs, it is very irritating.

Does anyone know what is happening?

Here is a screenshot of the problem. It shows the wrong result coming from what I typed in the edit box (the preview in the picture is directly off of what is written in the edit box and no changes were made).

 

[Gokul43201]

You tried all the usual stuff - clearing cache, refreshing window a half dozen times, etc?

 

[Math Jeans]

You tried all the usual stuff - clearing cache, refreshing window a half dozen times, etc?

Yeah. The equation that it keeps displaying is from a while ago too.

 

[Greg Bernhardt]

I don't believe the LaTeX feature is designed for signatures. Partially because the post id is used for part of the images name. Obviously there is no post id when making a signature.

 

[Math Jeans]

I don't believe the LaTeX feature is designed for signatures. Partially because the post id is used for part of the images name. Obviously there is no post id when making a signature.

But I've had the same problem making regular posts as well.

 

[Greg Bernhardt]

But I've had the same problem making regular posts as well.

ok I would send chroot a little PM

 

[fluidistic]

I have the same problem. It first appeared when I entered to Greg's blog. I almost got a heart attack when I saw something written in Latex : it was exactly what I wrote in a homework thread! I was thinking "what a coincidence!" but then I realized further on the page other formulas that I wrote and started to understand what was going on : it's like whatever there is written in Latex, it will always appear something you saw before, or maybe something you wrote in Latex before. It happens since more than a week (maybe even 2 or 3 weeks) at least.

 

[Fredrik]

I think you only get the wrong image when you mess up the LaTeX code (and apparently when you try to use LaTeX in signatures). Example:

I had already previewed the page and it looked fine except that I had written e(ipx) instead of e^{ipx}. So I changed it and previewed again. The old image was still there. Refresh didn't help. Then I noticed that I had actually written e^{ipx). So I replaced the ) with a } and previewed again. This time it looked the way I intended it to. No refresh needed.

 

[fluidistic]

I think you only get the wrong image when you mess up the LaTeX code (and apparently when you try to use LaTeX in signatures). Example:

Originally Posted by Fredrik View Post

I had already previewed the page and it looked fine except that I had written e(ipx) instead of e^{ipx}. So I changed it and previewed again. The old image was still there. Refresh didn't help. Then I noticed that I had actually written e^{ipx). So I replaced the ) with a } and previewed again. This time it looked the way I intended it to. No refresh needed.

You're wrong. It might appear when you enter a wrong Latex code but it's not the cause. I don't think Greg's blog contains only wrong typed Latex code.
Check out the first post on this thread, Math Jeans typed \sigma and what appeared was \sqrt{4az_0}. Both are well typed Latex code.
Hence that's a really strange bug.

 

[Redbelly98]

Math Jeans, if you just need Greek characters you can copy-and-paste from here:
https://www.physicsforums.com/blog.php?b=347
FYI, some characters look much better in boldface Times New Roman font

Mατη Jεανσ vs. Mατη Jεανσ

 

[Redbelly98]

FYI, this problem has been discussed previously:
https://www.physicsforums.com/showthread.php?t=273819

I just made a post with Latex and found that:

• Refreshing in preview mode does not get rid of the old LaTex image
• Refreshing after actually posting does get rid of the old image and displays the correct one.

At least this is the case in Firefox, the browser that I use.

I'm using Firefox too, and I don't have a problem with previews. Sometimes the wrong image shows up when I view what I just posted, but a refresh always takes care of that.

 

[chroot]

I really do think all of these kinds of problems are cache issues in the browser, but I don't know why some people seem to have recurrent problems and many others never have any. I'll try to reproduce some of these bugs myself, at least.

- Warren