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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

• CommentRowNumber1.
• CommentAuthorGuest
• CommentTimeDec 8th 2009
Removed erroneous material (due to me) at fundamental groupoid regarding topological structure on fundamental groupoid, and reworded paragraph to indicate what actually is possible.

David Roberts
• CommentRowNumber2.
• CommentAuthorMike Shulman
• CommentTimeDec 9th 2009

I did a bit of reorganization of this page, which had a bunch of different subjects all stuck together under "Remarks". It was also inconsistent about its use of $\pi_1$ and $\Pi_1$, so I tried to remedy that. I think the stuff about topologizing the fundamental groupoid is kind of confusing right now, but I don't know exactly what it's trying to say so I can't fix it.

• CommentRowNumber3.
• CommentAuthorGuest
• CommentTimeDec 9th 2009
Answered your question (I hope) at fundamental groupoid, but more needs to be done. There is probably some more reference to Ronnie Brown's work needed.

David Roberts
• CommentRowNumber4.
• CommentAuthorGuest
• CommentTimeDec 9th 2009
A little more patch-up to do with topology on Pi_1.

David Roberts
• CommentRowNumber5.
• CommentAuthorUrs
• CommentTimeDec 28th 2016

I have added to the References-section at fundamental groupoid pointers to

This observes that for good topological spaces and for Noetherian schemes the fundamental groupoid assignment $\Pi_1(-)$ is characterized as being 2-terminal among all co-stacks.

• CommentRowNumber6.
• CommentAuthorDmitri Pavlov
• CommentTimeOct 25th 2019