Vectors are denoted in boldface type such as $\mathbf{a}, \mathbf{b}, \mathbf{v}, \mathbf{w}$, and $\mathbf{x}$, and scalars are denoted in lowercase italic type such as $a, k, v, w$, and $x$. To indicate that a vector $\mathbf{v}$ has initial point $A$ and terminal point $B$, then: $$ \mathbf{v}=\overrightarrow{A B} $$