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I am interested in linking to an equation - but being able to change the text.

I had thought I could combine this answer and this answer, but I cannot seem to get it to work.

I have attempted a variety of syntaxes similar to

\hyperref[eq:name]{my text describing the equation here}

but I cannot seem to get it to work.

This is the code I am currently using (well my equation is considerably more complicated but I have the same problem here)

 y = x\label{testp}
\hyperref[testp]{generalized form}

I get the following warning

LaTeX Warning: Hyper reference `testp' on page 4 undefined on input line 108.
share|improve this question
up vote 3 down vote accepted

For this it is easiest to use a \hypertarget and \hyperlink combination since you technically don't have a "counter that you can reference" - this is provided by \refstepcounter, which marks a position that you can hyperlink to:

enter image description here

\usepackage{amsmath,hyperref}% http://ctan.org/pkg/{amsmath,hyperref}
% Taken from http://tex.stackexchange.com/a/17138/5764
  y = x \labeltarget{testp}
\hyperlink{testp}{generalized form}

Since \hypertarget sets its target at the baseline, it has to be raised for any practical application. See \hypertarget seems to aim a line too low.

share|improve this answer
This took a weird sequence of compiling but eventually worked (you seemingly need to compile the \newcommand successfully before you can use the \labeltarget). Thanks much - LaTeX is sure neat :) – enderland Nov 13 '12 at 3:58

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