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Joshua Wrigley (Nov 18 2021 at 14:15):Hi all,
I am looking to cite Johnstone's Topos Theory (1977, Academic Press) but the particular part I'm looking at has some errors, at least in my Dover reprint. I was wondering whether an errata was ever published since I'd rather say Johnstone corrected himself. A google search has come up empty.
Many thanks.
John Baez (Nov 18 2021 at 14:16):I have never heard of errata being compiled....
Nathanael Arkor (Nov 18 2021 at 14:20):My impression was that the Elephant was intended to replace Topos theory (though perhaps it does not totally subsume it?).
Zhen Lin Low (Nov 18 2021 at 14:30):Perhaps when vol. 3 comes out we will have something closer to a full replacement... At the moment cohomology is not treated.