Bug related to \hat{} in amsmath

Question

I'm trying to typeset an equation that contains the following:

\begin{align*}
\hat{\E[(R_{i}-\hat R_{i})^{2}]} 
\end{align*}

However, this is what I get

Bug?

Is this a bug? Is there any way around it? I'd like the "hat" to be over the whole expression, not just the expectation operator which I've defined as:

\newcommand{\E}{\mathbb{E}}

See also http://tex.stackexchange.com/questions/30327/why-do-arguments-to-nested-tilde-or-breve-commands-reappear-when-amsmath-is-us — egreg, Sep 23 '13 at 12:38

score 3 · Accepted Answer · edited Apr 13 '17 at 12:34

3

You have to use

\widehat{\E[(R_{i}-\hat{R}_{i})^{2}]}

or if you want a bigger hat see this question.

edited Apr 13 '17 at 12:34

Community

1

answered Sep 23 '13 at 12:14

Red

10,181

Bug related to \hat{} in amsmath

1 Answers1