J.C. Ottem's user avatar
J.C. Ottem's user avatar
J.C. Ottem's user avatar
J.C. Ottem
  • Member for 14 years, 1 month
  • Last seen more than 2 years ago
65 votes
2 answers
4k views

How many cubes cover a bigger cube?

40 votes
1 answer
3k views

Did any new mathematics arise from Ruffini's work on the quintic equation?

39 votes
4 answers
4k views

What can we learn from the tropicalization of an algebraic variety?

22 votes
2 answers
836 views

Do finitely many plurigenera determine the Kodaira dimension?

20 votes
2 answers
2k views

Varieties where every non-zero effective divisor is ample

18 votes
3 answers
1k views

What is known about the birational involutions of P^3?

17 votes
2 answers
987 views

Line bundles vs. Cartier divisors on a non-integral scheme

14 votes
1 answer
980 views

Kodaira dimension and fundamental groups

11 votes
3 answers
2k views

When is a blow-up Cohen-Macaulay?

10 votes
1 answer
583 views

Noether-Lefschetz over finite fields

7 votes
1 answer
736 views

Are there any sofware packages for computing Picard numbers?

6 votes
2 answers
2k views

When does the conormal bundle sequence split?

5 votes
2 answers
531 views

If $k[S]$ is noetherian, is S finitely generated?

5 votes
3 answers
535 views

Quadrics containing many points in special position

5 votes
2 answers
518 views

Examples of surface automorphisms with no periodic points