I'm trying to color a single cell in smallmatrix, but it seems to me that the \cellcolor doesn't work in smallmatrix:
\documentclass{article} \usepackage{amsmath} %smallmatrix \usepackage[table]{xcolor} %cellcolor \begin{document} \[ \left(\begin{array}{cc} \cellcolor{gray}1&2 \end{array}\right) \quad \left(\begin{smallmatrix} \cellcolor{gray}1&2 \end{smallmatrix}\right) \] \end{document} You can see that the array is colored as desired while in smallmatrix \cellcolor doesn't do anything.
Does anyone know how to do color cells in smallmatrix?

