1

enter image description here

I really don't know how to write that 'Y' in latex. I have tried many methods but I didn't succeed. Any help will be appreciated.

Mico
  • 506,678

2 Answers2

10

If you don't want the underline to extend that far over the symbols' “boundaries”, you might want to consider using the accents package for the macro \underaccent{<accent>}{<glyph>}. See the following MWE for an illustration:

\documentclass{article}
\usepackage{accents}
\begin{document}
$\underaccent{\bar}{Y}$ vs.\ $\underline{Y}$
\end{document}

enter image description here

Henri Menke
  • 109,596
1

I would start with

\underline{Y}

in either inline-math or displaystyle-math mode.

Mico
  • 506,678