A vector is a linear algebra concept which correlates to an arrow or point in the plane. A variable that refers to a vector is often drawn with an arrow on top, as shown below.
The arrow can either be a full arrow as or as a partial arrow (harpoon) as . The components of a vector a denoted in various ways. This website uses angle brackets for horizontal components and parenthesis for vertical compontents. The angle bracket notation is shown below, where the variables , and represent individual components.
Sometimes the components are referenced using subscript.
Sometimes vectors are written as columns with parenthesis.