Longer symbol for ``not dividing''

Question

Some time ago I needed a bigger \nmid. From

Why does \big\mid not work?

I found a solution by using \bigm\vert. Now I need the "not dividing" symbol that is a bigger than \nmid. I see some ways to get it bigger, but it needs to be compatible with the \bigm\vert. How do I do this?

Answer 1

I have recreated the new \nmid using your starting \bigm\vert with a \nnmid inserted into a macro that exactly simulates the "not dividing" larger symbol and it aligns perfectly with your \bigm\vert. I hope that I have answered your question.

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath,amssymb}
\usepackage{graphicx}
\newcommand{\nnmid}{\bigm\vert\kern-1.5ex\raisebox{.4ex}{\rotatebox[origin=c]{40}{--}}}
\begin{document}
[a\nmid b \nnmid  d\bigm\vert c]
\end{document}

You can choose also this MWE where the minus sign it is more tickness.

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath,amssymb}
\usepackage{graphicx}
\newcommand{\nnmid}{\bigm\vert\kern-2.2ex\raisebox{.4ex}{\rotatebox[origin=c]{40}{$-$}}}
\begin{document}
[a\nmid b \nnmid  d\bigm\vert c]
\end{document}