tea.mathoverflow.net - Discussion Feed (Report bugs with LaTeX (jsMath) rendering here.)

Scott Carnahan comments on "Report bugs with LaTeX (jsMath) rendering here." (7803)

Scott Carnahan — Fri, 30 Jul 2010 19:22:59 -0700

I had replaced the \varinjlim commands in the old version with \underset{i}{\lim_{\longrightarrow}}, since I had seen the \underrightarrow problem before. Unfortunately, the bug (whatever it is) does not seem to manifest consistently. Now I get jbl's error message when I look at the edit history (with the same browser as before).

jbl comments on "Report bugs with LaTeX (jsMath) rendering here." (7683)

jbl — Tue, 27 Jul 2010 06:29:47 -0700

When I look at the old version in the edit history, I have four broken LaTeX formulas; the warning message asserts "Unknown control sequence '\underrightarrow'"

Scott Carnahan comments on "Report bugs with LaTeX (jsMath) rendering here." (7682)

Scott Carnahan — Tue, 27 Jul 2010 06:20:14 -0700

Charles Rezk mentioned a \varprojlim problem on April 16 in this thread, but I'd like to point out that when I looked at this question, $\varinjlim$ rendered correctly in preview, but threw up an error when being displayed after submission. However, when I look at the edit history now, the old version seems to render fine.

Evan Jenkins comments on "Report bugs with LaTeX (jsMath) rendering here." (7675)

Evan Jenkins — Mon, 26 Jul 2010 21:36:02 -0700

@Anton: Thanks! I'm sure I must've encountered (and fixed!) this problem before, but I completely forgot about it.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (7671)

Anton Geraschenko — Mon, 26 Jul 2010 21:12:20 -0700

@Evan: the problem is that _phrases between underscores_ get converted to italics, like this, before the math processor gets a chance to look at them. The accepted workaround is to tell markdown to leave the underscores alone by enclosing your math in backticks, like this:

`$\operatorname{Foo}_{bar}$`

Another alternative, assuming you don't have any markdown syntax in the paragraph, is to enclose the paragraph in P tags, like this:

I really like using $\operatorname{Foo}_{bar}$ as an operator.

Evan Jenkins comments on "Report bugs with LaTeX (jsMath) rendering here." (7666)

Evan Jenkins — Mon, 26 Jul 2010 17:32:46 -0700

I've encountered a strange bug when trying to append subscripts to things of the form "\operatorname{Foo}." Specifically, I want to be able to write "\operatorname{Aut}_{\textbf{Tw}}(k[G])." I can do this, and it will work. Once! But if I put another one in, both of them turn to gobbledygook, both in the preview and in the actual post. The problem seems to occur whenever there are two instances of "\operatorname{something}_{somethingelse}"; the curly braces in the subscript seem to be relevant. Looking through the comments here, it appears that \operatorname has been problematic in the past; were all of the kinks (supposedly) worked out?

Yiftach Barnea comments on "Report bugs with LaTeX (jsMath) rendering here." (6684)

Yiftach Barnea — Tue, 06 Jul 2010 02:36:40 -0700

Hi Scott, I have tried Firefox and it works. Thanks!

Scott Morrison comments on "Report bugs with LaTeX (jsMath) rendering here." (6683)

Scott Morrison — Sun, 04 Jul 2010 22:36:31 -0700

Hi Yiftach, sorry you haven't received a response yet. Perhaps you could try a more modern browser, e.g. Firefox, Safari, Opera or Chrome? You might also try clearing the browser cache in Explorer in case it's has somehow mis-cached the javascript that renders the LaTeX.

Yiftach Barnea comments on "Report bugs with LaTeX (jsMath) rendering here." (6591)

Yiftach Barnea — Thu, 01 Jul 2010 10:18:04 -0700

Up until recently I was able to see the Latex, but now I can't. I am using explorer and I am using 3 different computers and in 2 different locations. Today I have checked whether I have the right chracters, I didn't. So I uploaded the characters to 2 of these computers, but it didn't seem to help.

Any suggestions? You are welcome to contact me via email if you prefer.

Thanks!

Jon Awbrey comments on "Report bugs with LaTeX (jsMath) rendering here." (6022)

Jon Awbrey — Fri, 11 Jun 2010 20:00:51 -0700

I've noticed that when I come to the main site by way of a search engine the jsmath is blocked somehow. This is all in Firefox.

Harald Hanche-Olsen comments on "Report bugs with LaTeX (jsMath) rendering here." (5757)

Harald Hanche-Olsen — Sun, 06 Jun 2010 06:53:27 -0700

Odd. It looks fine to me in firefox on the mac, but looking at the source, I notice that formulas containing underscores are not surrounded by backticks. Possibly that is part of the problem.

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5756)

Kevin Buzzard — Sun, 06 Jun 2010 02:34:16 -0700

OK so here's something that is probably related to the jsMath (re)processing. On a mac, with chrome, *not logged in*, in this question: http://mathoverflow.net/questions/27229/polynomials-with-rational-coefficients as I type there is a line "$\boldsymbol a=(a_1,\dots,a_n)$" in the source , which, when not logged in as I say, fails to render at all and gives me "Unknown control sequence '\boldsymbol'" in bright yellow. No amount of hitting "(Re)process jsMath" fixes this. In fact, when not logged in and in chrome, this question is unreadable to me because there are six TeX errors all involving failure to understand boldsymbol.

OK so the moment I log in on chrome and reprocess jsMath, this becomes fixed.

Now here's the behaviour under firefox (still on a mac). The first time I looked at the page, the boldsymbols didn't render but didn't give me an error either. I see a partly rendered page, with blackboard-bold R's but with the word "boldsymbol" here and there. When I hit "reprocess jsMath" everything is fixed and I can finally read the question.

So what is going on? Not only is jsMath not rendering, it's somehow not rendering in two different ways. Or is this just two different browers' reactions to the same problem?

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (5594)

Anton Geraschenko — Mon, 17 May 2010 16:09:48 -0700

Some lines of math are also jutting out of the margins in Chrome for some reason. (A little, uh, math overflow, if you will.) I'm using Vista.

That's some weird interaction between jsMath and webkit browsers. I can't do anything about that. It doesn't seem to happen with MathJax.

Qiaochu Yuan comments on "Report bugs with LaTeX (jsMath) rendering here." (5592)

Qiaochu Yuan — Mon, 17 May 2010 14:43:07 -0700

Some lines of math are also jutting out of the margins in Chrome for some reason. (A little, uh, math overflow, if you will.) I'm using Vista.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (5589)

Anton Geraschenko — Sun, 16 May 2010 23:46:16 -0700

The math preview doesn't seem to be working in Chrome. Is anyone else having this problem?

Yes. I don't know what's going on. The live preview doesn't work in Chrome (on linux), but does work in Firefox. It works in both on another machine running Windows XP. The weird thing is that the one-shot preview works fine, so it's clear that jsMath is working properly. Hmmm ... maybe the modified wmd.js isn't getting loaded for some reason?

Edit: indeed, it looks like the custom version of wmd.js (which incorporates jsMath processing) isn't loading properly. I don't understand why. More Edit: it sometimes works and sometimes doesn't.

Qiaochu Yuan comments on "Report bugs with LaTeX (jsMath) rendering here." (5585)

Qiaochu Yuan — Sun, 16 May 2010 22:07:23 -0700

The math preview doesn't seem to be working in Chrome. Is anyone else having this problem?

Scott Morrison comments on "Report bugs with LaTeX (jsMath) rendering here." (5515)

Scott Morrison — Tue, 11 May 2010 04:40:59 -0700

Thanks Anton, I'd forgotten I could override the font mode.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (5478)

Anton Geraschenko — Sun, 09 May 2010 09:32:17 -0700

jsMath wraps math in a span of class "typeset" and then has lots of internal spans with classes like "cmsy10" (or other font families). There's a css rule that says that such a thing should use the font family "jsMath-cmsy10". Perhaps the cmsy10 TeX-Illustrator font is somehow taking the place of jsMath-cmsy10, but isn't exactly the same. The ≺ character appears two steps before the - character in jsMath-cmsy10, so you would expect this kind of problem if you used an almost-but-not-quite-the-same font.

If you weren't using jsMath fonts before and don't want to use them, you can always click the jsMath box in the lower right hand corner of your browser, click "options", then click the "use image fonts" radio button. That will save a cookie which tells jsMath to always use image fonts.

Scott Morrison comments on "Report bugs with LaTeX (jsMath) rendering here." (5475)

Scott Morrison — Sat, 08 May 2010 21:32:18 -0700

I just installed the TeX-Illustrator fonts (for the obvious purpose of using Computer Modern inside Illustrator), but now jsmath is messed up. Here's an example from http://mathoverflow.net/questions/23437/are-the-q-catalan-numbers-q-holonomic/23930#23930:

Any ideas? I hadn't wanted to installed the jsmath fonts locally for the sake of keeping my experience in sync with "new users" on mathoverflow. I'm using OS X 10.6.

François G. Dorais comments on "Report bugs with LaTeX (jsMath) rendering here." (5374)

François G. Dorais — Wed, 05 May 2010 16:47:25 -0700

I think I found a hack. I replaced "\mathbf{Q}_p" by "\mathbf{Q}{}_p". That fixed the dropping p for me.

Harald Hanche-Olsen comments on "Report bugs with LaTeX (jsMath) rendering here." (5373)

Harald Hanche-Olsen — Wed, 05 May 2010 16:27:58 -0700

My screenshot was firefox on mac. Maybe the available fonts influence the result?

Andrew Stacey comments on "Report bugs with LaTeX (jsMath) rendering here." (5370)

Andrew Stacey — Wed, 05 May 2010 13:19:02 -0700

On Opera on Linux, I see:

which is clearly gibberish!

I don't have iceweasel installed, it's a rebranding of firefox so I don't see why it should be so different, plus you see it on firefox as well.

Looking at your screenshot, the subscript 'p's don't look any smaller than the non-subscript ones. It's a little hard to see, though, so I may be wrong.

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5369)

Kevin Buzzard — Wed, 05 May 2010 13:03:44 -0700

@Harald: :-) But to both Harald and Andrew---what is going on? I am currently using Chrome 5.0.342.9 beta on a mac and I still have this p mayhem: p _really_ low on the Q. I've now seen this on a mac under firefox and chrome and on a linux box under iceweasel. Are you telling me that somehow all three set-ups are somehow not optimal? Both of you have non-droopy p's, which is what I yearn for.

Harald Hanche-Olsen comments on "Report bugs with LaTeX (jsMath) rendering here." (5362)

Harald Hanche-Olsen — Wed, 05 May 2010 07:57:08 -0700

@buzzard: There is no bluff. I misunderstood your point. When you wrote “it looks like the p fell off” I thought it was a cute way of saying the p was missing or something. Usually, when things go bump in the night the first thing you think of is the backquotes (or lack thereof), hence my post. If you had been more specific, I would of course have answered differently. Anyway, what I see is again quite different than what either you or Andrew sees, but not outrageously wrong:

Andrew Stacey comments on "Report bugs with LaTeX (jsMath) rendering here." (5360)

Andrew Stacey — Wed, 05 May 2010 04:40:17 -0700

This is what I see:

Comparing the two, I think that another difference is in the rendering of the Z and Q themselves.

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5358)

Kevin Buzzard — Wed, 05 May 2010 03:42:55 -0700

PS I cannot reconcile that monstrosity with your "ever-so-slightly lower" comment so I am assuming you can see something else. I appear to be using Iceweasel 3.0.6 .

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5357)

Kevin Buzzard — Wed, 05 May 2010 03:41:17 -0700

Here's a screenshot of what it looks like for me:

http://www2.imperial.ac.uk/~buzzard/droopyp.gif

Andrew Stacey comments on "Report bugs with LaTeX (jsMath) rendering here." (5356)

Andrew Stacey — Wed, 05 May 2010 03:28:32 -0700

Looks fine to me (firefox 3.6 on linux). The p under the Q is ever-so-slightly lower than that on the Z, but not unpleasingly so. I could send you a screenshot if you like.

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5355)

Kevin Buzzard — Wed, 05 May 2010 02:53:23 -0700

PS @Harald: can you confirm that on your browser the p's under the Q's are much much lower than the p's under the Z's?

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5354)

Kevin Buzzard — Wed, 05 May 2010 02:52:37 -0700

@harald: I'm going to call your bluff. At the time you wrote your comment there were no backquotes to escape the formulae. But this isn't for the reason you think :-) When I wrote the answer I backquoted to escape all the formulae with underscores in. It was only after that that I noticed the droopy p's. I removed all the backquotes in an attempt to fix the problem. The problem did not go away. I couldn't be bothered to put them back and I just posted. So I believe this is not the issue. As a result of your comment I just went and put them all back. The issue is still there on....umm...this time it's firefox under debian linux.

Harald Hanche-Olsen comments on "Report bugs with LaTeX (jsMath) rendering here." (5353)

Harald Hanche-Olsen — Tue, 04 May 2010 17:35:23 -0700

When doing mathematics with underscores or asterisks in it, you need to escape the formula with backquotes (outside the dollar signs).

Kevin Buzzard comments on "Report bugs with LaTeX (jsMath) rendering here." (5352)

Kevin Buzzard — Tue, 04 May 2010 14:46:33 -0700

Apologies---I'm sure this has been flagged before, but I see 152 comments and I've not been keeping up with this thread and I can't face reading all of them. The issue is that I just wrote a mathbf Q p (p-adic numbers) and a mathbf Z p (p-adic integers) with an underscore to do the subscripts, and the p-adic integers came out great (umm what am I using---looks like firefox on my girlfriend's mac) and the p-adic numbers it looks like the p fell off. See my answer at http://mathoverflow.net/questions/23477/z-p-flatness-and-irreducible-components but this has happened to me several times before.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (5079)

Anton Geraschenko — Mon, 26 Apr 2010 11:48:59 -0700

I can't reproduce Noah's bug, but it's consistent with weird jsMath behavior people have reported lately. Perhaps there's some sort of a race condition that prevents certain packages from loading sometimes. jsMath does seem to be sensitive to the order in which I load various things (things that I wouldn't expect to matter).

Scott Morrison comments on "Report bugs with LaTeX (jsMath) rendering here." (5072)

Scott Morrison — Mon, 26 Apr 2010 11:02:41 -0700

@noah, almost certainly, there's some extra step to load new fonts that isn't being performed when you preview. Perhaps try editing a question that already has \mathrm, and seeing if preview works in that case.

Noah Snyder comments on "Report bugs with LaTeX (jsMath) rendering here." (5051)

Noah Snyder — Sun, 25 Apr 2010 23:02:54 -0700

Bug report: \mathrm and similar font-y commands don't preview correctly (though they seem to work fine on the actual page).

Mariano comments on "Report bugs with LaTeX (jsMath) rendering here." (4869)

Mariano — Tue, 20 Apr 2010 23:40:44 -0700

jsMath is not rendering for me on question pages. Reloading the page or reprocessing does not seem to so anything. :/ Did anything change lately?

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4835)

Anton Geraschenko — Mon, 19 Apr 2010 19:30:01 -0700

@Peter: the underscores are causing the problem because markdown tries to turn underscores into italics sometimes. For example, if you type something like _this_, it gets interpreted as this. So when you type the top line in the block below, it get converted to the second line before jsMath gets a chance to look at it (and jsMath doesn't want to touch anything with html markup inside of it), so it gets rendered as the third line:

$E[x]_\sigma$ is equal to $E[x]_\sigma$
$E[x]\sigma$ is equal to $E[x]\sigma$
$E[x]\sigma$ is equal to $E[x]\sigma$

The accepted solution is to put backquotes around your math whenever this problem shows up, like this:

`$E[x]_\sigma$` is equal to `$E[x]_\sigma$`

Peter McNamara comments on "Report bugs with LaTeX (jsMath) rendering here." (4832)

Peter McNamara — Mon, 19 Apr 2010 16:27:36 -0700

This is a behaviour I don't understand, and one I noticed only in the preview (I wasn't brave enough to see what happened when I hit send.)

When I typed $E[x]_\sigma$ for the second time in the same paragraph, it wouldn't preview correctly and would cause all of the mathmode text between the two occurrences of $E[x]_\sigma$ to no longer be in mathmode.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4775)

Anton Geraschenko — Fri, 16 Apr 2010 13:33:31 -0700

@Charles: it seems to be having some trouble unwrapping the command \varprojlim. Sometimes it works correctly for me, sometimes it complains that \varprojlim is undefined, and sometimes it complains that \underleftarrow is undefined (this presumably comes up in the definition of \varprojlim). Perhaps the extra macro packages are sporadically failing to load. I'll see if I can do anything about it.

Charles Rezk comments on "Report bugs with LaTeX (jsMath) rendering here." (4767)

Charles Rezk — Fri, 16 Apr 2010 10:28:07 -0700

I'm seeing a problem in this answer: http://mathoverflow.net/questions/21492/stacks-in-the-zariski-topology/21500#21500

The TeX in the tenth paragraph, after "the natural map" comes up as "Unknown control sequence '\underleftarrow'". When I go to edit, I don't see this particular control sequence at all, so I don't know what is going on.

Bill Johnson comments on "Report bugs with LaTeX (jsMath) rendering here." (4760)

Bill Johnson — Thu, 15 Apr 2010 13:12:11 -0700

@Anton. For me this problem happens in Firefox on two different Macs. I have to hit the reprocess math button every time I open a post.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4740)

Anton Geraschenko — Wed, 14 Apr 2010 10:29:50 -0700

@rwbarton: when I updated the way jsMath is loaded, I accidentally introduced an error in the definition of \operatorname (I left something as \\\\ instead of \\). It should be fixed now.

I'm experiencing the problem right now that the live preview isn't working. Is anybody else getting this? I'm looking into it. (Edit: this problem happens in chrome, but not firefox)

rwbarton comments on "Report bugs with LaTeX (jsMath) rendering here." (4736)

rwbarton — Wed, 14 Apr 2010 06:41:50 -0700

I also just managed to reproduce another odd behavior: the error message "\\ can only appear in a matrix or array", which appeared when processing both

[X,-]:\mathcal C\to\mathcal End(X)-\operatorname{mod}

and

\operatorname{Bl}_{Z}(X)

(here and here respectively).

rwbarton comments on "Report bugs with LaTeX (jsMath) rendering here." (4735)

rwbarton — Wed, 14 Apr 2010 06:32:34 -0700

> Here is a strange bug I don't know how to reproduce: Sometimes, when I load this page, several of the equations are replaced by the error message "Unknown symbol \binom". Reloading fixes this. Does anyone else see this?

Yes, this happened to me for the first time just now.

David Speyer comments on "Report bugs with LaTeX (jsMath) rendering here." (4733)

David Speyer — Tue, 13 Apr 2010 08:08:51 -0700

You are both right. My bad, I thought I had tried backquoting those but, based on a test case, I had not.

Andrew Stacey comments on "Report bugs with LaTeX (jsMath) rendering here." (4732)

Andrew Stacey — Tue, 13 Apr 2010 07:59:21 -0700

I wrapped all the displayed mathematics in '

' tags (which is better style than backticks as '

' tags says "Markdown keep out" whereas backticks says "Markdown treat this as code").

rwbarton comments on "Report bugs with LaTeX (jsMath) rendering here." (4731)

rwbarton — Tue, 13 Apr 2010 07:53:10 -0700

I would guess that is because WMD is replacing \\ by \ before jsMath looks at it. Try wrapping it in backticks?

David Speyer comments on "Report bugs with LaTeX (jsMath) rendering here." (4730)

David Speyer — Tue, 13 Apr 2010 07:45:24 -0700

As discovered on the above mentioned page, $\begin{array}{c}x\\y\end{array}$ will produce "Unknown symbol \y". On a true LaTeX installation, the second backslash will bind to the first, not to the y.

David Speyer comments on "Report bugs with LaTeX (jsMath) rendering here." (4729)

David Speyer — Tue, 13 Apr 2010 07:40:43 -0700

Here is a strange bug I don't know how to reproduce: Sometimes, when I load this page, several of the equations are replaced by the error message "Unknown symbol \binom". Reloading fixes this. Does anyone else see this?

Bill Johnson comments on "Report bugs with LaTeX (jsMath) rendering here." (4626)

Bill Johnson — Wed, 07 Apr 2010 13:06:58 -0700

"Radii and centers in Banach spaces and "In a Banach algebra, do ab and ba have almost the same exponential spectrum?" are not rendering correctly for me.

I am using Firefox 2.0.0.7 on a Mac.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4578)

Anton Geraschenko — Wed, 07 Apr 2010 00:21:23 -0700

@qnoodles: I'm able to reproduce your problem on my home computer. It looks like using image fonts "fixes" the problem. It looks like jsMath actually does express greek letters as decorated roman letters, but in spans with special classes. These classes are translated into font families via some css that jsMath injects into the header. I think firefox is failing to apply those css rules for some reason.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4572)

Anton Geraschenko — Tue, 06 Apr 2010 23:01:04 -0700

I've just updated the way that jsMath is loaded in the footer. Please let me know if you notice a difference in speed, or if you find that you need to reprocess the page (see this thread) more or less frequently.

qnoodles comments on "Report bugs with LaTeX (jsMath) rendering here." (4453)

qnoodles — Mon, 05 Apr 2010 13:48:31 -0700

@Anton: Yes, commas become semicolons on planetmath.

Selecting image fonts resolves the odd substitutions. They don't scale well, but I can deal with that...

Are you suggesting that the other problems (e.g. commas become semicolons) do occur on the MathJax preview?

No, it's just that there are no visible test cases there.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4450)

Anton Geraschenko — Mon, 05 Apr 2010 12:29:11 -0700

@qnoodles: Do you have the same problem on other sites that use jsMath? For example, does the math come out funny on planetmath? What happens if you click the jsMath button is the bottom right-hand corner of your browser, click "options", and tell it to use image fonts?

The last at least does not happen with the MathJax preview page

Are you suggesting that the other problems (e.g. commas become semicolons) do occur on the MathJax preview?

qnoodles comments on "Report bugs with LaTeX (jsMath) rendering here." (4447)

qnoodles — Mon, 05 Apr 2010 11:49:36 -0700

for whatever reason, my browser [Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3] together with mathoverflow's jsMath, etc., makes some really weird character choices inside formulae; commas become semicolons, full stops become colons, greek letters named in TeX become various decorated roman characters. The last at least does not happen with the MathJax preview page, nor with greek letters named in html-escaped forms.

Running in debian [2.6.31-trunk-686 #1 SMP Tue Oct 13 22:34:42 UTC 2009 i686 GNU/Linux] with packages jsmath-fonts and ttf-jsmath installed.

dthurston comments on "Report bugs with LaTeX (jsMath) rendering here." (4351)

dthurston — Sun, 04 Apr 2010 08:31:41 -0700

All jsMath rendering stopped working for me sometime last night. I also seem to be unable to vote anything up or down. I tried disabling all JavaScript blocking, to no avail. Has something changed?

Akhil Mathew comments on "Report bugs with LaTeX (jsMath) rendering here." (4346)

Akhil Mathew — Sat, 03 Apr 2010 13:24:57 -0700

Ah, I see. Thanks!

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (4341)

Anton Geraschenko — Sat, 03 Apr 2010 10:38:01 -0700

@Akhil: the < characters are being interpreted as html markup for some reason. You can fix the problem with the usual trick: add some backquotes, so it becomes `$0

In my browser, writing $0

Akhil Mathew comments on "Report bugs with LaTeX (jsMath) rendering here." (4337)

Akhil Mathew — Sat, 03 Apr 2010 09:37:33 -0700

I had difficulty with
http://mathoverflow.net/questions/20246/how-to-construct-a-topological-conjugacy

When I tried to write $0

Georges Elencwajg comments on "Report bugs with LaTeX (jsMath) rendering here." (3699)

Georges Elencwajg — Sat, 06 Mar 2010 01:40:23 -0800

Dear Anton, things are running quite smoothly now and I only have to reprocess the math sporadically. The link in the sidebar is indeed more comfortable (though I was already very happy when it was at the bottom of the page): thank you once more for the trouble you took. By the way, I'm getting used to jsMath and like to use LaTex with it: it's a great feeling to see the mathematics rendered instantaneously. The only problem is that I get too little practice in answering, since usually I am completely stumped by the clever and difficult questions asked by the sophisticated users of our dear Mathoverflow !

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (3693)

Anton Geraschenko — Fri, 05 Mar 2010 19:51:03 -0800

@Georges: I still don't understand what's going on. I hope that the problem goes away when we switch to MathJax. For now, I've moved the "(Re)process math" link to the sidebar (which I assume you prefer). Sorry I couldn't find a better solution.

Sonia Balagopalan comments on "Report bugs with LaTeX (jsMath) rendering here." (3665)

Sonia Balagopalan — Fri, 05 Mar 2010 00:12:16 -0800

@Scott: Thank you!

Scott Morrison comments on "Report bugs with LaTeX (jsMath) rendering here." (3655)

Scott Morrison — Thu, 04 Mar 2010 16:39:56 -0800

@Sonia,

adding backticks around that latex string fixes the symptoms, but I don't know the cause.

Georges Elencwajg comments on "Report bugs with LaTeX (jsMath) rendering here." (3651)

Georges Elencwajg — Thu, 04 Mar 2010 11:48:07 -0800

Dear Anton: YES! I didn't reload the page but just clicked on the words "(Re)process math" and LaTeX was perfectly rendered. La vie est belle (life is beautiful) ...with a little help from my friends.

Sonia Balagopalan comments on "Report bugs with LaTeX (jsMath) rendering here." (3650)

Sonia Balagopalan — Thu, 04 Mar 2010 10:47:47 -0800

http://mathoverflow.net/questions/17103/quadratic-forms-over-finite-fields
When jsMath renders the quoted text it swallows the $Y_1,\cdots,Y_{2s}$ between 'than' and 'and', which is very mysterious.
I'm on Chrome for Linux, by the way.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (3648)

Anton Geraschenko — Thu, 04 Mar 2010 06:54:58 -0800

@Georges: I've tried adding an additional bit of debugging. The bottom of the page should now say "loading jsMath files. (Re)process math" where clicking on the words "(Re)process math" instructs jsMath to do it's thing. Does clicking this link (without reloading the page) get math to render properly?

Georges Elencwajg comments on "Report bugs with LaTeX (jsMath) rendering here." (3644)

Georges Elencwajg — Thu, 04 Mar 2010 05:44:05 -0800

Dear Anton, in the case at hand I had already noticed that the text "loading jsMath files" indeed appears but with no result. Strangely, the problems seem to materialize essentially with extremely new questions, say "asked 10 minutes ago", and then things get working on their own after a short period.. I only took the liberty of bringing this up here because the original poster, Sean Tilson, had been bothered by the problem too.
With many thanks for your prompt (as usual) response.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (3606)

Anton Geraschenko — Wed, 03 Mar 2010 18:14:10 -0800

That's pretty weird, because we haven't changed anything about jsMath for a long time. Maybe they've changed something on the servers and they're having trouble getting the files to you. I've added a line of text for debugging purposes. Whenever jsMath is loaded on a page, the very bottom of the footer should say "loading jsMath files". Next time jsMath fails to process the page, can you please check to see if these words appear?

Georges Elencwajg comments on "Report bugs with LaTeX (jsMath) rendering here." (3600)

Georges Elencwajg — Wed, 03 Mar 2010 14:02:07 -0800

Since the revision of the site a few weeks ago, LaTeX is often not rendered unless I reload the page several times.
Today the problem has gotten worse with Sean Tilson's question
http://mathoverflow.net/questions/17010/complex-orientations-on-homotopy
which got rendered only after many, many tries.
He seems to have had problems himself with the preview.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (3445)

Anton Geraschenko — Thu, 25 Feb 2010 06:54:00 -0800

If you want to see the source, but don't have 2000+ reputation (so you can't edit), you can still do it by looking at the revision history ... see tip number 5.

The post you mention (the question, and the answers) don't seem to be using jsMath at all.

It looks pretty silly, but that question (and those two answers) were posted October 17 and 18, and we didn't have any LaTeX support back then ... MO had just launched. Since the question was bumped up to the home page, I'll go edit it now to use dollar signs.

A couple of other people have mentioned jsMath requiring a page refresh to work sometimes, which shouldn't be happening. If we don't solve that problem (it's hard to since I can't reproduce it), hopefully it will go away when we switch to MathJax.

Andrea comments on "Report bugs with LaTeX (jsMath) rendering here." (3442)

Andrea — Thu, 25 Feb 2010 05:06:11 -0800

By the way, is it possible for everyone to check the source, so that if I run into this problem again (as I told it is far from the first time) I can check if this is a jsMath bug or a poorly formatted question/answer?

Andrea comments on "Report bugs with LaTeX (jsMath) rendering here." (3441)

Andrea — Thu, 25 Feb 2010 05:02:59 -0800

Uhm... so we have one question and two answer using LaTeX notation and everyone managed not to put it in dollar signs?

Harald Hanche-Olsen comments on "Report bugs with LaTeX (jsMath) rendering here." (3439)

Harald Hanche-Olsen — Thu, 25 Feb 2010 04:01:41 -0800

@Andrea: I don't understand. The post you mention (the question, and the answers) don't seem to be using jsMath at all. Not a dollar sign in sight when I look at the source.

Andrea comments on "Report bugs with LaTeX (jsMath) rendering here." (3438)

Andrea — Thu, 25 Feb 2010 03:44:59 -0800

I have a similar problem with jsMath rendering, and much more often in the last days (often enough to convince me to subscribe at meta). An example is this page

I don't get the rendered math with either Firefox 3.5.7, Chrome 5.0 or Opera 10.10 on Ubuntu 9.10, even after many reloads. The dollars disappear and the content is shown as is.

Sam Lichtenstein comments on "Report bugs with LaTeX (jsMath) rendering here." (2836)

Sam Lichtenstein — Tue, 09 Feb 2010 14:33:39 -0800

Weird bug: \otimes (and only \otimes, it seems!) fails to render on Chrome (on Ubuntu). It works fine in Firefox.

Charles Rezk comments on "Report bugs with LaTeX (jsMath) rendering here." (2515)

Charles Rezk — Thu, 04 Feb 2010 14:59:30 -0800

I'm using firefox on Linux. It seems that reopening the browser fixed the problem, whatever it was ...

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (2514)

Anton Geraschenko — Thu, 04 Feb 2010 14:56:44 -0800

@Charles: I can't reproduce the problem. What browser/OS combination are you using? My guess is that there's nothing we can do about it now, but that the problem won't come up again once we switch to MathJax, which seems to be much more stable than jsMath. Unfortunately, right now MathJax is still very slow compared to jsMath, so we can't switch yet.

Charles Rezk comments on "Report bugs with LaTeX (jsMath) rendering here." (2513)

Charles Rezk — Thu, 04 Feb 2010 14:54:38 -0800

Well, it's working now, so never mind!

Charles Rezk comments on "Report bugs with LaTeX (jsMath) rendering here." (2512)

Charles Rezk — Thu, 04 Feb 2010 14:51:08 -0800

LaTeX doesn't get rendered when I view this page: http://mathoverflow.net/questions/10237/does-the-convolution-theorem-apply-to-weaker-algebraic-structures

I see the little box at the corner which says "Processing Math: 0%", but it never changes. This is consistent behavior for this page; all other pages seem to be loading fine.

Andrew Stacey comments on "Report bugs with LaTeX (jsMath) rendering here." (2122)

Andrew Stacey — Sun, 24 Jan 2010 23:58:34 -0800

I see this behaviour (as described by algori in Room 101, above) from time to time. At first, I would try to edit the post as I ascribed it to a fault in the syntax, but then when I was unable to find the fault I would "return to question/answer" only to find it rendering correctly again. I have no ideas as to why it might be happening, though. I'm using Firefox 3.0.17 on Linux.

algori comments on "Report bugs with LaTeX (jsMath) rendering here." (2105)

algori — Sat, 23 Jan 2010 22:32:11 -0800

PS The Math Jax page shows correctly.

algori comments on "Report bugs with LaTeX (jsMath) rendering here." (2104)

algori — Sat, 23 Jan 2010 22:18:01 -0800

Anton -- I'm normally using Chrome 3.0 under Windows Xp. I've just tried IE8, and there was the same problem.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (2103)

Anton Geraschenko — Sat, 23 Jan 2010 22:05:21 -0800

@algori: I've never seen that. What browser/OS are you using?

Also, does this behavior happen on the MathJax preview page (I ask because we'll probably switch from jsMath to MathJax once MathJax is out).

algori comments on "Report bugs with LaTeX (jsMath) rendering here." (2102)

algori — Sat, 23 Jan 2010 21:39:46 -0800

It often happens that when one loads a page, only a part of the LaTex formulae is rendered. The rest is shown without dollars, but the LaTex part does not get compiled. One usually has to reload the page a few times until it is shown properly. Is there a way to fix that?

Thanks!

algori comments on "Report bugs with LaTeX (jsMath) rendering here." (1788)

algori — Wed, 13 Jan 2010 12:53:13 -0800

Thanks, Jon! I'm not sure what escaping means, but this worked!

Jon Awbrey comments on "Report bugs with LaTeX (jsMath) rendering here." (1786)

Jon Awbrey — Wed, 13 Jan 2010 12:45:24 -0800

Does escaping the asterisk with a slash in front work?

algori comments on "Report bugs with LaTeX (jsMath) rendering here." (1784)

algori — Wed, 13 Jan 2010 11:53:24 -0800

There is a slightly annoying problem I've encoutered: if there are more than 1 asterisk in a paragraph, everything between certain pairs of asteriscs does not show properly. Is there a way to fix that?

Thanks!

Sam Derbyshire comments on "Report bugs with LaTeX (jsMath) rendering here." (1626)

Sam Derbyshire — Fri, 08 Jan 2010 16:36:46 -0800

That worked, thanks a lot.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (1625)

Anton Geraschenko — Fri, 08 Jan 2010 16:19:52 -0800

@Sam: Try deleting the jsMath cookie from mathoverflow.net. That resets all the jsMath settings to default for me.

Sam Derbyshire comments on "Report bugs with LaTeX (jsMath) rendering here." (1623)

Sam Derbyshire — Fri, 08 Jan 2010 15:37:59 -0800

I messed with the jsmath controls one time too many, and now each time I open a question I get a popup saying:
"For security reasons, framing is not allowed; click OK to remove the frames."
and then the page proceeds to reload indefinitely, each time coming up with the popup and restarting.

I can't access the jsmath panel in mathoverflow; I tried accessing it from other websites and changing the settings, but that didn't have any effect (I don't know what going global is supposed to do, but no luck with my problem there). I also tried to change settings through http://latex.mathoverflow.net/jsMath/ but I don't think that had any effect either.

Is there any way I can completely reset my jsmath config? I couldn't find anything after searching.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (1504)

Anton Geraschenko — Wed, 06 Jan 2010 08:37:14 -0800

I unstickied it more or less on a whim last night. The reasoning was that it's been a long time since a bug was actually reported here rather than reported elsewhere and copied here by an old hand, and that this thread is likely not very useful to anybody who didn't read it as it was happening. But I guess that was as true (or false) three weeks ago when it was requested that this thread be sticky, so I'll re-sticky it. Sorry about the confusion.

David Speyer comments on "Report bugs with LaTeX (jsMath) rendering here." (1502)

David Speyer — Wed, 06 Jan 2010 07:46:04 -0800

Out of curiosity, why is this no longer sticky?

Scott Morrison comments on "Report bugs with LaTeX (jsMath) rendering here." (1495)

Scott Morrison — Wed, 06 Jan 2010 03:33:08 -0800

Works fine for me, Safari 4.0.4 on an MacBook Air, no fonts installed.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (1245)

Anton Geraschenko — Mon, 28 Dec 2009 11:47:13 -0800

I'm pretty sure he doesn't have the fonts installed, so it's a problem with the image fonts. It must be related to the problem Andrew reported with \cdots earlier in this thread.

He's also just confirmed that everything looks good with the MathJax preview page.

David Speyer comments on "Report bugs with LaTeX (jsMath) rendering here." (1243)

David Speyer — Mon, 28 Dec 2009 11:40:39 -0800

Works fine for me, Safari 4.0.3 on an iBook. Does the user have jsMath fonts installed?

Alberto GarciaRaboso comments on "Report bugs with LaTeX (jsMath) rendering here." (1242)

Alberto GarciaRaboso — Mon, 28 Dec 2009 11:38:39 -0800

@Anton: Just for the record, I use Safari 4 on a MacBook Pro and I see the correct output, both that of the question and of the MathJax preview page. I did install the jsMath fonts.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (1240)

Anton Geraschenko — Mon, 28 Dec 2009 10:27:26 -0800

Somebody reported the following problem with jsMath to me. Browsing this question with Safari on a Macbook, instead of getting the correct output (left), he gets the output on the right:

I've asked him to check if he also has the same problem with MathJax's preview page.

Anton Geraschenko comments on "Report bugs with LaTeX (jsMath) rendering here." (1217)

Anton Geraschenko — Sun, 27 Dec 2009 12:02:39 -0800

Btw, the preview/final output discrepancy bug has been completely fixed on SO. Hopefully those changes will be merged into SE soon.

rwbarton comments on "Report bugs with LaTeX (jsMath) rendering here." (1208)

rwbarton — Sat, 26 Dec 2009 17:31:46 -0800

@Kevin: yes, this bug (overflowing jsmath text with space on the next line in Safari and Chrome) has been mentioned on this thread previously.