Can anyone help me in knowing which mathbb font is being used here and how to use it?
Thanks!
Those two : Q and Z look like those from the dsfont package with the sans option.
\documentclass[12pt, border=2pt]{standalone}
\usepackage[sans]{dsfont}
\begin{document}
$\mathds{ZQ}$
\end{document}
\usepackage[sans]{dsfont},$\mathds{ZQ}$. – marsupilam Jun 01 '17 at 16:58