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The LaTeX command for variance is \operatorname{Var} — variance.
\operatorname{Var}Write \operatorname{Var} inside math mode — that is, between $…$ for inline math or in a \[ … \] / equation block for display math. This symbol needs the amsmath package, so add \usepackage{amsmath} to your preamble.
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\mathbb{E}\mathbb{P}\operatorname{Cov}\operatorname{Cor}\mathbb{1}\mathcal{N}\perp\!\!\!\perp\xrightarrow{d}\xrightarrow{p}\xrightarrow{a.s.}\overset{\text{iid}}{\sim}Search all 380+ LaTeX symbols →
Use \operatorname{Var} in math mode after adding \usepackage{amsmath} to your preamble. For example, $\operatorname{Var}$.
It comes from the amsmath package — add \usepackage{amsmath} to your preamble.