LaTeX \skew Command — Horizontally adjust the positioning on accents, tilde, and hat etc.

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\documentclass{article}
\usepackage{amsmath}

\newcommand{\skewhat}[1]{\skew{2}\hat{#1}}

\begin{document}

$$\ddot{h} \iff \skew{-2}{\ddot}{h}$$

$$\hat{AB} \iff \skewhat{AB}$$

\end{document}