# Writing expectation like Shiryaev

I want to know how to get this symbol for Expectation. I tried with Mathpix to know the command, but it doesn't help.

Thanks!

Here's your formula using the default fonts:

\documentclass{article}
\begin{document}
$\mathsf{E}\left[g(\theta) \mid \xi = x_j\right]$
\end{document}


• Do you need the \left and \right` sizing directives? – Mico Apr 26 at 2:35