# Capital and small nu

I couldn't figure out the command for Capital Nu as shown in the picture. I tried \Nu but it doesn't work.

• It's not a capital nu… because this is a capital: N. It is probably a large-size lowercase nu or a math calligraphic V. Mar 13, 2015 at 2:52
• Could you show me the latex commands? Because I am new to LaTeX and don't understand a bunch of words you just use.
– TBBT
Mar 13, 2015 at 2:54
• math calligraphic means try this: \mathcal{V} May 11, 2018 at 20:02

Some Greek capital letters look the same as Latin capitals and therefore don't have unique commands. Nu is one of them. The list of these Greek capitals is available from several sources, including

Α α alpha
Β β beta
Ε ε epsilon
Ζ ζ zeta
Η η eta
Ι ι iota
Κ κ kappa
Μ μ mu
Ν ν nu
Ο ο omicron
Ρ ρ rho
Τ τ tau
Υ υ upsilon
Χ χ chi

Just use N for capital nu.

• Thank you. Let suppose that I want to enlarge $\nu$, what command should I use?
– TBBT
Mar 13, 2015 at 3:12
• $\tilde{\mathcal{V}}$ Mar 13, 2015 at 3:15
• I think my question is miss leading. I should be asking what is the command for Script V?
– TBBT
Mar 13, 2015 at 3:18

It is certainly a math calligraphic V. Here is the formula, reproduced as faithfully as possible:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\newcommand\I{\mathrm i}
\newcommand\E{\mathrm e}

\begin{document}

\begin{alignat*}{2}
& \widetilde{\mathcal{V}} &{} = -\hbar \Omega \Bigl\{ &\sigma_ + \E^{-\I(\Delta t-\varphi)}\bigl[1 + \I\eta(b\E^{-\I\nu t} + b^{\dagger}\E^{\I\nu t})\bigr]\Bigr. \\
& & \Bigl. {}+{} &\sigma_ -\E^{\I(\Delta t-\varphi)}\bigl[1 - \I\eta(b\E^{-\I\nu t} + b^{\dagger}\E^{\I\nu t})\bigr]\Bigr\}.
\end{alignat*}%

\end{document}

• ...and $\tilde{\mathcal{V}}$ would give you the tilde above the V Mar 13, 2015 at 3:25
• Yes, I've just seen (and corrected) that. Mar 13, 2015 at 3:27
• Your \widetilde looks better. Interestingly the original seems to have just used a narrow tilde though. Mar 13, 2015 at 3:29
• Many people think \widetilde is for a group of several letters, but actually it is better, in my opinion, for single wide letters (m or capital letters). Mar 13, 2015 at 3:32