When typing an open interval as $]a,b[$, a closing bracket is
being used in place of an opening fence and vice versa. This
leads to the wrong spacing in, say, $]-a,b[$ or $A\in]a,b[=B$.
The package attempts to solve this using: \interval{a}{b} ->
[a,b] \interval[open]{a}{b} -> ]a,b[ \interval[open left]{a}{b}
-> ]a,b] The package also supports fence scaling and ensures
that the enclosing fences will end up having the proper closing
and opening types. TeX maths does not do this job properly.
date: 2014-02-20 17:37:10 +0100
