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user234212323
  • Member for 3 years, 1 month
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14 votes
2 answers
691 views

Who introduced the notion of 2-categories?

11 votes
1 answer
680 views

A non-conventional definition of topoi

8 votes
0 answers
333 views

Who introduced the notion of ringed spaces?

7 votes
2 answers
321 views

Indexing categories of derivators

5 votes
1 answer
284 views

Axioms of derivators

4 votes
1 answer
575 views

Who introduced nerves in category theory?

3 votes
0 answers
186 views

The site and the space

3 votes
4 answers
545 views

Phenomena of topos

2 votes
0 answers
291 views

Cartier and the continuity of the early history of schemes

1 vote
1 answer
147 views

"Variable and fixed" in categories

1 vote
0 answers
214 views

Kan extensions in Grothendieck school

1 vote
0 answers
49 views

Defining properties of categories out of an indicial category