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I like oranges and algebraic geometry.

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All Questions Answers
Score Newest
answer
12
Are there infinitely many primes of the form $n^2 - 1$?
Jul 3, 2019
answer
8
Good books on stacks
May 1, 2020
answer
7
How many subgroups of $S_8$ with index $2$?
Jul 2, 2019
answer
7
Remembering Riemann-Roch
Apr 17, 2020
answer
7
What is the coproduct in the category of commutative rings?
Sep 10, 2019
answer
7
Do we need to check all 10 axioms to verify that some set, call it $V$, is a vector space?
Sep 21, 2019
answer
6
Interesting topological spaces to calculate the homology groups.
Jul 1, 2019
answer
6
What is the difference between an "empty interior" and a "hole" in topology?
Jul 3, 2019
answer
6
Examples of presheaves which are not sheaves
Sep 20, 2019
answer
6
Doubt about proof in Tube Lemma
Oct 13, 2019

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