I'd like for RefTeX to know about labels defined by tcbtheorem environments. Here's an example where RefTeX does not find the relevant label...


\begin{theorem}{Important theorem}{foobar}
  Test of theorem.

Reference to theorem: \ref{thm:foobar}.


The most similar question I can find is RefTeX not finding `label={name}` in custom environment, but it doesn't quite answer the question for me.

1 Answer 1


RefTeX is not able to parse the label prefix argument defined in \newtcbtheorem and then add it to the label definition foobar so you can reference thm:foobar. If you can skip the prefix and add it manually to each label definition, you probably can use the technique described in RefTeX manual under 15 Problems and Work-arounds and do something like this in your init file:

(setq reftex-label-alist
      '(("\\begin{theorem}{}{*}" ?o "thm:" "~\\ref{%s}" 3)))

This way, RefTeX should be able to detect your label definition and support referencing it.

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