Vector in LaTeX

A vector with an arrow is written as \vec{v}. University textbooks more often use bold, \mathbf{v}. Pick one convention and stick with it throughout the document.

\vec{F} = m\vec{a} \qquad \mathbf{F} = m\mathbf{a}

\hat{\imath}, \hat{\jmath}, \hat{k}

\vec{a} \cdot \vec{b} = |\vec{a}||\vec{b}|\cos\alpha, \quad \vec{a} \times \vec{b}

\overrightarrow{AB}

Common mistakes

• \vec{AB} for a segment: the arrow covers only one letter. Over two letters use \overrightarrow.
• Using * or x as the cross product instead of \times.

See also

• Matrix in LaTeX
• Derivative in LaTeX
• Greek letters in LaTeX