How to use Nu(ν) symbol in LaTeX?

To print the Nu symbol in a LaTeX document, you just need to use LaTeX’s default command \nu.

\documentclass{article}
\begin{document}
   \[ \nu Z.\left(\bigvee _{a\in A}\langle a\rangle \top \wedge \bigwedge _{a\in A}[a]Z\right) \]
   \[ [\nu]=\frac{m^2}{s} \]
   \[ \nu =\frac{\mu}{\rho} \]
   \[ \nu =-{\frac{d\varepsilon _{{\mathrm{trans}}}}{d\varepsilon _{{\mathrm{axial}}}}} \]
\end{document}

Output :

Upright nu symbol in LaTeX

To print the upright Nu Greek symbol in a LaTeX document you need to use a package called upgreek.

This package provides a command called upnu that allows you to print this symbol into a document.

\documentclass{article}
\usepackage{upgreek}
\begin{document}
   \[ \verb|\nu|\rightarrow \nu \quad \verb|\upnu|\rightarrow \upnu \]
   \[ [\upnu]=\frac{m^2}{s} \]
   \[ \upnu =\frac{\mu}{\rho} \]
   \[ \upnu =-{\frac{d\varepsilon _{{\mathrm{trans}}}}{d\varepsilon _{{\mathrm{axial}}}}} \]
\end{document}

Output :

Also, if you want to print the nu and upright nu symbols in bold, this is not possible with LaTeX’s default command \mathbf{}. For this you need a package called bm.

Using the \bm command included in this package, you can easily print these symbols in bold in a latex document. Take a look

\documentclass{article}
\usepackage{upgreek}
\usepackage{bm}
\begin{document}
   \[ \verb|\mathbf{\nu}|\rightarrow \mathbf{\nu} \]
   \[ \verb|\mathbf{\nu}| \rightarrow \mathbf{\upnu}\]
   \[ \verb|\bm{\nu}|\rightarrow \bm{\nu} \]
   \[ \verb|\bm{\upnu}|\rightarrow \bm{\upnu} \]
\end{document}

Output :