I need to typeset letter with a circle above it in math. \dot A does a very close result, but I need something that looks like \circ, not like \cdot.
Edit: there is awesome answer here, but Detexify failed for me, and I tried looking up tables, but haven't found what I needed.
\mathring{A}. – Manuel Apr 30 '15 at 08:33texdoc symbolsgiven as the first option in the top answer - table 164 Math mode accents, the same table containg\dot. That not only answers your question, but tells you how to find answers to similar questions. – Andrew Swann Apr 30 '15 at 09:59