[Tex/LaTex] Letter with circle above — not a dot — in math mode


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.

Best Answer

Use \overset{\circ}{X} or \mathring{X} for letter X say
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