I've tried to do this in the Group theory front page but I can't get it to work. I think that this is a bug rather than my stupidity, because I copied into the Sandbox exactly what it suggests in the formatting page, and I have the same problem: it treats what I write as a link to a nonexistent page.
I agree with Tim on this point; I encountered a similar problem trying to create
a link to a section within something I was writing. It seems to work for examples,
but not for headings.
The problem should be sorted now. I think it was an issue related to the 'accents in links' problem.
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