Jan Weidner's user avatar
Jan Weidner's user avatar
Jan Weidner's user avatar
Jan Weidner
  • Member for 14 years, 3 months
  • Last seen more than 1 year ago
  • Freiburg
91 votes

Nontrivial theorems with trivial proofs

60 votes

Suggestions for good notation

47 votes

Blackbox Theorems

42 votes
Accepted

What is the general geometric interpretation of modules in algebraic geometry?

34 votes

Most striking applications of category theory?

14 votes
Accepted

Can we define homotopy groups using Tannakian categories

12 votes

Blackbox Theorems

12 votes

Things that should be positive integers...really?

11 votes

Graded local rings versus local rings

11 votes
Accepted

Faithfulness of derived functor.

8 votes

Characterizing specific "concrete" mathematical objects by abstract general properties

8 votes

Awfully sophisticated proof for simple facts

7 votes

Is the direct image of a constant sheaf a constant sheaf?

7 votes

Intersection of all normalizers

6 votes

Awfully sophisticated proof for simple facts

6 votes

Applications of the "other" definition of sheaves

5 votes

Best online mathematics videos?

5 votes
Accepted

moduli problem for flag varieties?

4 votes
Accepted

spectrum of an induced algebra

4 votes

Which commutative algebras admit a nonzero Poisson bracket?

3 votes
Accepted

Has there been any application of tensor species?

2 votes

Combinatorial results without known combinatorial proofs

2 votes

Best online mathematics videos?

2 votes

Subspaces of finite codimension in Banach spaces

2 votes

intermediate/middle extension of perverse sheaves

1 vote

Does a locally free sheaf over a product pushforward to a locally free sheaf?

1 vote

Differential operators on M/G are factor of invariant differential operators on M ? (Quantization commute with reduction ) What is state of art ?

1 vote

Distinguished triangle of closed - open partition, for D-modules

1 vote

Does the Riemann-Hilbert Correspondence work at the DG level?

1 vote

A_infinity structure on cohomology and the weight filtration