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• CommentRowNumber1.
• CommentAuthorUrs
• CommentTimeApr 15th 2021

added publication details for this reference:

and am copying it over to compactly generated topological space, too

• CommentRowNumber2.
• CommentAuthorUrs
• CommentTimeApr 16th 2021
• (edited Apr 16th 2021)

made more explicit the statement that all those notions of epimorphisms agree in regular categories (here)

• CommentRowNumber3.
• CommentAuthorUrs
• CommentTimeSep 22nd 2021

added (here) the example $Grp$ which prointer to where in Borceux this is discussed.

• CommentRowNumber4.
• CommentAuthorUrs
• CommentTimeNov 8th 2021

The fact that $cgHaus$ is regular was mentioned in the references, but not in the list of Examples, which ended instead with the counter-example saying that $Top$ is not regular.

So I have added mentioning of $cgHaus$ also in the list of examples, now here.

• CommentRowNumber5.
• CommentAuthorUrs
• CommentTimeNov 9th 2021

• CommentRowNumber6.
• CommentAuthorUrs
• CommentTimeNov 9th 2021
• (edited Nov 9th 2021)

I have fixed the (previously somewhat weird) referencing of the original text and added the DOI-link:

• CommentRowNumber7.
• CommentAuthorUrs
• CommentTimeNov 10th 2021

I have added (here) compactly generated $G$-spaces to the list of examples.

• CommentRowNumber8.
• CommentAuthorUrs
• CommentTimeJul 7th 2022

for the claim that every topos is regular. (Also added pointers to other references for this fact. see here)

• CommentRowNumber9.
• CommentAuthormaxsnew
• CommentTimeSep 15th 2022

xref with allegories

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