Vector Projection
The vector projection of a vector $$$$\textbf{u}$$$$ on a vector $$$$\textbf{v}$$$$ is given by :
$$$$\textrm{Proj}_\textbf{v} \textbf{u}= \large{ \frac{\textbf{u} \cdot \textbf{v} }{\textbf{v} \cdot \textbf{v}} } \normalsize{\textbf{v}}$$$$
where the operator $$$$\cdot$$$$ denotes a dot product.