### More subjects

I am curious, is it easy to move all problems of a subtopic to another subtopic and is it easy to move from a subtopic to a topic? Might I push for the ability to place a problem in up to three topics and subtopics? Many current and potential are categories are overlapping and rightly so.

I believe we need the following

\item Probability / Measure (I'm not sure what a good collecting term for these topics would be)
\item Probability Theory \item Measure Theory \item [Mathematical) Statistics \item Stochastic Processes

\item Applied Mathematics

\item [Theoretical/Mathematical) Physics (it could be given its own subject if enough problems are added)