# Have Latex tables stopped working?

In a range of browsers, I've found that $\LaTeX$ tables no longer seem to work on this site. Neither of these posts display correctly:

How to test for a synergistic effect of A & B with proportions of treatment effects, if I don't have the full 2x2 table?

Significant predictors become non-significant in multiple logistic regression

Were these misformatted in the first place? Their Latex looks okay to me but perhaps they did not display correctly before - I know I have seen some other instances of Latex tables but they may have been constructed differently. Or has support for Latex tables changed?

I can see the same problem on Maths SE so it isn't specific to CV.

• I might be wrong, but I don't think LaTeX tables have ever been supported on SE. I've seen arrays in the LaTeX maths environment, which look like tables. – Scortchi - Reinstate Monica Apr 23 '15 at 12:08
• @Scortchi This may well be the case. My memory may be deceiving me, but I am sure I recall seeing "tables" in Latex complete with gridlines. Perhaps they were heavily formatted arrays, or similar - I'm not enough of a Latex wizard to know! – Silverfish Apr 23 '15 at 12:12
• I always use arrays -- they can include lines; I could never figure out how to get tables to work, and I eventually concluded that they didn't. – Glen_b Apr 24 '15 at 1:10

I don't think \begin{table} has ever worked on the SE system. (There is a relevant thread on meta.SE from 2009 here: Why can't table markup elements be used?) I don't believe it is supported by Mathjax. To make a "table" in $\LaTeX$ / Mathjax on the SE sites that support it, use \begin{array}{}... \end{array}. I have an example here: DF for regression SS in multiple linear regression when sigma is known, and I discussed the issue on meta.SE here: Is there any markdown to create tables?