I have been trying to type $\hat{A}=(2/\hbar)\boldsymbol{a}\cdot\boldsymbol{\hat{S}}$ into miktex yet it keeps giving me the missing number error. Can someone please explain how I can fix this?
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amsmathpackage, it works for me:\documentclass{article} \usepackage{amsmath} \begin{document} $\hat{A}=(2/\hbar)\boldsymbol{a}\cdot\boldsymbol{\hat{S}}$ \end{document}– Steven B. Segletes Apr 6 at 0:52