How to do \mathbf in handwriting? I have a bunch of vectors and matrices that are written using \mathbf, eg $\mathbf{w}$ and $\mathbf{W}$.  What are standard ways of writing these in hand-writing?
I know this is not exactly a maths question, but I'm not sure where else to ask it really?

Since it is hopeless to write bold-face characters by hand, people introduced symbols like
$$
\vec{w}, \quad \underline{w}, 
$$
for vectors. Matrices are usually written in roman characters, but with upper case: $A$, $B$, $W$, etc.
Mathematicians do not like strange symbols for vectors, and they tend to write simply $v$, $w$ as if they were writing scalar quantities. The context makes the difference. Physicists and engineers prefer arrows, as far as I know.
