LaTeX: Accents in math mode

To type the letter 'å' in normal text more in LaTeX, one can write:

Code:

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\r{a}

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(if you enble the correct package, you can type a normal å as well)

But how do i use the character 'å' in math mode? The rules are different for characters in mathmode, for example here's how to type 'ä':

Code:

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$ \ddot{a} $

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What is the command for a ring?

Most of you americans here probably haven't encountered this problem.

Code:

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\dot{a}

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looks acceptable, but I'm not really satisfied. It should be a ring.

EDIT:

Code:

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$\stackrel{\circ}{a}$

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technically works, but looks horrible.

EDIT2: Problem solve using the \text command