Hi, I expected \parallel to work after success with \perp. That is, I've executed in buffer M-x org-toggle-pretty-entities RET, and I expected to see \parallel as unicode ∥, since \perp is overlayed (correct term?) with ⟂. Though, the former is pretty hard to see, so maybe it was decided against.
I just tried exporting to HTML (and MathJax), and it looks like the LaTeX delimited symbols should be either $\parallel$ or $\|$. So simply writing $||$ in ones' notes would /not/ be the same. ,---- | Org-mode version 8.2.10 | (8.2.10-1-g8b63dc-elpa | @ /home/iam/.emacs.d/elpa/org-20141027/) `---- -- Brady