[Tex/LaTex] How to redefine \hat{H} as \hat{\cal H}

accentsmath-modesymbols

I would like to redefine \hat{H} as \hat{\cal H} only for this particular letter (for Hamiltonian symbol in physics). Thank you very much.

Best Answer

Well I guess that there are two ways of proceeding here:

  • Use the "find and replace" tool of your editor to replace all the matches of \hat{H} by \hat{\mathcal{H}} or

  • a bit more appealing... in the preamble of the document define a new command, say \newcommand*{\hham}{\hat{\mathcal{H}}}. Then use the "find and replace" tool of your editor to replace all the matches of \hat{H} by \hham

A MWE would be

\documentclass{article}
\usepackage{amsmath}
\newcommand*{\hham}{\hat{\mathcal{H}}}

\begin{document}

The relation,
\[\hham\psi_n = E_n\psi_n\]
is valid for every  eigenstate $\psi_n$ of the Hamiltonian $\hham$.
\end{document}

Cheers!

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