stacked \widetilde and \dot

Question

I need to typeset (from bottom up) math bold L with above-dot and widetilde (both centered horizontally above the L), i.e. approximate time-derivative of tensor-valued function.

(I would google more, but being one-handed those days makes it a bit more difficult.)

Answer 1

Isn't

\widetilde{\dot{\mathbf{L}}}

working?

Answer 2

The amsmath package should be loaded in the preamble. Then the following code should do what you need;

$\widehat{\dot{\mathbf{L}}}$