# How can write two tilde on the center of the top of the estimators p and m [duplicate]

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\begin{frame}{Investigation Accuracy of Estimators  by the Method of Statistical simulation}
To investigate the accuracy properties of the estimators by the method of statistical simulations, we considered original and corrected of the estimators.

% these are the two tilde

$var(\tilde\tilde{p}_n)=E{(\tilde\tilde{p}_n-p)^2}$
Asymptotic variance $p$
$\lambda_{11}=\frac{(1-p) ( 2 (1-p) m+3p-2)} {m}.$
\end{frame}
\begin{frame}


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• Welcome to TeX.SE! Are you looking for \sim? – marmot May 25 '18 at 14:40