# Homework Help: Vector basic problem

1. Oct 9, 2017

### Ray Vickson

The commands "\bf{x}" or "\mathbf{x}" both produce $\bf{x}$ and $\mathbf{x}$. The commands "\mathbf{x}^2" and "\mathbf{x^2}" produce $\mathbf{x}^2$ and $\mathbf{x^2}$, one of which has a bold superscript and the other not. The command \mathbf{x \times \alpha}" produces $\mathbf{x \times \alpha}$ (with bold $\bf x$ but non-bold $\alpha$ and non-bold $\times$), while "\boldsymbol{x \times \alpha}" produces $\boldsymbol{x \times \alpha}$, where everything is in bold.

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