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6

There is a special command for that in the stackengine package: \documentclass{article} \usepackage[utf8]{inputenc} \usepackage{lmodern} \usepackage[svgnames]{xcolor} \usepackage{amsmath} \usepackage{stackengine} \begin{document} \stackinset{c}{}{c}{}{\color{red}$\scriptstyle\circ$}{\color{ForestGreen}$x$} \quad ...


3

Not with tikz \documentclass{scrartcl} \usepackage{graphicx} \makeatletter \def\cx {{\ooalign{x\cr \hidewidth\raisebox{.2ex}{$\m@th\scriptscriptstyle\circ$}\kern.01em \hidewidth\cr}}} \def\cX {{\ooalign{X\cr \hidewidth\raisebox{.4ex}{$\m@th\scriptstyle\circ$}\kern.01em \hidewidth\cr}}} \makeatother \begin{document} \cx\ and \cX ...


5

With tikz \documentclass{article} \usepackage{tikz} \newcommand{\circledx}{% \begin{tikzpicture} \node[inner sep=0pt,outer sep=0pt] (a) {x}; \draw (a.center) circle (0.15ex); \end{tikzpicture} } \newcommand{\circledX}{% \begin{tikzpicture} \node[inner sep=0pt,outer sep=0pt] (a) {X}; \draw (a.center) circle (0.2ex); \end{tikzpicture} } ...


2

In the absence of MWE.. you need this rather paradoxical bit begin{axis}[ tick label style={/pgf/number format/assume math mode=true},%<=== here ]



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