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I noticed that (is this related to migration to new version) that very many pages containing the LaTeX formulas delegated to codecogs do not work any more in nLab and it says invalid equation. Using xymatrix format is quite essential to me. For examples see split equalizer (zoranskoda) in my public lab. To me all the benefits of the upgrade together are much less than the ability to use xymatrix. Though the software for codecogs exist in stand alone version not referring to online production. It would be better to have the stand alone version; it is not free though.
Can you provide me with an example of an \xymatrix that works in the codecogs editor? I just tried a simple one in their online editor and it didn’t work so I’m unable to test where the problem lies as I’m unable to generate working code on their site.
Here’s some other websites that use codecogs with xymatrix also showing the “invalid equation” error:
So I recommend that you take your complaint to the codecogs people as it would appear that they have disabled xy.
You can also use this diagram renderer: http://presheaf.com
Darn. So I have now briefly edited HowTo to reflect this (minimally).
So I recommend that you take your complaint to the codecogs people as it would appear that they have disabled xy.
Maybe they do it for online editions, but the standalone I suppose can do it, and once one has a standalone version, nobody could disable it. I have seen no other reason to use codecogs here other than to use it for xy packet…
4 > You can also use this diagram renderer: http://presheaf.com
How can I import those renderings into nlab entries in real time, updatable ?
OK, now some general thinking on TeX environ, nothing to do with nLab:
I also think much of our problems with math rendering in general is due to the TeX non-modularity. 99% of why we use TeX versions is for good and flexible rendering of math formulas. But TeX is also doing zillion of other things like formatting pages, paragraphs, chapters, numerating formulas etc. etc. etc. which have nothing to do with the major thing, If one would have a small part of TeX which just translated local text (plus the basic logic of counters and macros which has nothing to do with output), e.g. formula code to its rendering and allowing macros and predefined extra symbols we could use this code in so many applications online and at a desktop. But somehow Knuth had philosophy that formatting book chapters should be in the same software and that we should change this to call it TeX. I think this external formatting is so unimportant to the heart of this beautiful software and it is so non-transferrable to new kinds of media like web. Unlike the basic logic of TeX and unlike the stuff about local presentation, within a paragraph or even more strictly within a formula. So if one even writes the subset which is about a being able to code a single formula code then it is questionable when it is TeX and when not. Also dvi plugin viewers for web browsers have the same problem: they want to view many pages or big chunks. Why not take this away and then just show the microwindows of dvi images of various size which could be embedded anywhere in web page.
On Sep 2011, codecogs rep said
Regarding our inclusion of xypic, unless we find it significantly degrades performance or has a security liability we won’t remove it.
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