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I would like to reference named (but unnumbered theorems) with a hyperlink. I have a solution which I consider at least a semi-hack:


\newtheorem*{Zorn}{Zorn's lemma}

This is Zorn's lemma

That was \hyperlink{lem:Zorn}{Zorn's lemma}.

However I wonder if there is a neater solution (possibly using thmtools or cleveref) that would reference back to a \label for the unnumbered theorem?

share|improve this question
I don't think this is a hack. However, you could use \newtheorem*{lemma}{Lemma} and then \begin{lemma}[Zorn]\label{lem:zorn}...\end{lemma} with \nameref{lem:zorn}. It would change the display of the lemma's though (with the name in brackets. – Werner Feb 10 '14 at 21:08
up vote 9 down vote accepted

Use a fake counter to keep hyperref happy:






\begin{named}{Zorn's lemma}\label{lem:Zorn}
This is Zorn's lemma


That was \ref{lem:Zorn}.


You can have as many unnumbered theorems as you want.

enter image description here

share|improve this answer
This is exactly what I wanted, thanks. However... when I insert it to the long book I am writing I get two "undefined control sequence" errors pointing to the line containing the \newcounter. Quite possibly this is related to me using thmtools and cleveref? – Noam Feb 13 '14 at 7:15
@Noam That's a possibility; try with \newtheorem*{namedthm}{\protect\namedthmname} – egreg Feb 13 '14 at 10:10
This seems to work. Thanks! – Noam Feb 16 '14 at 6:36

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