Symbols

• Vectors are indicated by lowercase letters topped by an arrow, like this: [latex]\overrightarrow{u}[/latex] or [latex]\overrightarrow{v}[/latex].
• Vectors can also be indicated by a segment identifying its two end points, such as: [latex]\overrightarrow{\textrm{AB}}[/latex] ou [latex]\overrightarrow{\textrm{CD}}[/latex]