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charset="utf-8" Content-Transfer-Encoding: quoted-printable You can see the publication history of Chapter 4 of Th=C3=A9orie des Ensemb= les here: http://archives-bourbaki.ahp-numerique.fr/elements-mathematique#elements-ma= th1 If people have access to older copies they might check the 1957 and 1966 ed= itions of the standalone ch4, and the 1970 edition of the full book. More p= atient people m8ght like to dig through the drafts at http://archives-bourbaki.ahp-numerique.fr/items/browse?search=3D&type=3D5&s= ort_field=3DDublin+Core%2CTitle&advanced[0][element_id]=3D99&advanced[0][ty= pe]=3Dis+exactly&advanced[0][terms]=3DTh%C3%A9orie+des+ensembles Eilenberg was active in Bourbaki, don't forget, and was writing drafts on c= ategory theory. I can't recall when he ceased working with them offhand. David On Sun, 3 Mar 2024, 1:09 pm Nikita Danilov, > wrote: CAUTION: External email. Only click on links or open attachments from trust= ed senders. ________________________________ This reminds me of a (probably trivial) question that occurred to me some t= ime ago. N. Bourbaki's Theory of Sets has a result very similar to the gene= ral adjoint functor theorem (CST22 in Chapter IV, 3.2). This volume was pri= nted about 4 years after Abelian Categories. Is the history behind the Bour= baki's version known? Thank you, Nikita. On Sat, 2 Mar 2024 at 19:55, Michael Barr, Prof. > wrote: Peter has called my attention to the existence of some historical notes in = the preface to the TAC reprint (TR-3) of Abelian categories. In particular= , he had already essentially discovered the general adjoint functor, at lea= st for reflective subcategories) in his undergrad honors thesis, even thoug= h adjoints had not yet been defined. The preface in the TAC reprint includ= es things not in any other published version of the book. Michael You're receiving this message because you're a member of the Categories mai= ling list group from Macquarie University. To take part in this conversatio= n, reply all to this message. View group files | Leave group = | Learn more about Microsoft 365 Groups You're receiving this message because you're a member of the Categories mai= ling list group from Macquarie University. To take part in this conversatio= n, reply all to this message. View group files | Leave group = | Learn more about Microsoft 365 Groups You're receiving this message because you're a member of the Categories mai= ling list group from Macquarie University. To take part in this conversatio= n, reply all to this message. View group files | Leave group | = Learn more about Microsoft 365 Groups --0000000000009a2fdd0612b945ee Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
You can see the publication history of Chapter 4 of Th=C3= =A9orie des Ensembles here:

http://archives-bourbaki.ahp-num= erique.fr/elements-mathematique#elements-math1

If people have access to older copies they might check th= e 1957 and 1966 editions of the standalone ch4, and the 1970 edition of the= full book. More patient people m8ght like to dig through the drafts at

http://archive= s-bourbaki.ahp-numerique.fr/items/browse?search=3D&type=3D5&sort_fi= eld=3DDublin+Core%2CTitle&advanced[0][element_id]=3D99&advanced[0][= type]=3Dis+exactly&advanced[0][terms]=3DTh%C3%A9orie+des+ensembles<= /div>

Eilenberg was active in Bourbaki, don't forget, and was w= riting drafts on category theory. I can't recall when he ceased working wit= h them offhand.

David

On Sun, 3 Mar 2024, 1:09 pm Nikita Da= nilov, <danilov@gmail.com> w= rote:
CAUTION: External email. Only= click on links or open attachments from trusted senders.

This reminds me of a (probably trivial) question that occu= rred to me some time ago. N. Bourbaki's Theory of Sets has a result very si= milar to the general adjoint functor theorem (CST22 in Chapter IV, 3.2). Th= is volume was printed about 4 years after Abelian Categories. Is the history behind the Bourbaki's v= ersion known?

Thank you,<= /div>
Nikita.


On Sat, 2 Mar 2024 at 19:55, Michael = Barr, Prof. <barr.michael@mcgill.ca> wrote:
Peter has called my attention to the existence of some historical notes in = the preface to the TAC reprint (TR-3) of Abelian categories.  In parti= cular, he had already essentially discovered the general adjoint functor, a= t least for reflective subcategories) in his undergrad honors thesis, even though adjoints had not yet been defi= ned.  The preface in the TAC reprint includes things not in any other = published version of the book.

Michael
 
 
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