Right vector in LaTeX

Symbol Command
$\vec{a}$ \vec{a}
$\vec{\alpha}$ \vec{\alpha}
$\vec{abc}$ \vec{abc}
$\overrightarrow{AB}$ \overrightarrow{AB}
$\Overrightarrow{AB}$ \Overrightarrow{AB}
$\overrightharpoon{AB}$ \overrightharpoon{AB}
$\underrightarrow{AB}$ \underrightarrow{AB}

LaTeX vector

LaTeX