Ryan Reich's user avatar
Ryan Reich's user avatar
Ryan Reich's user avatar
Ryan Reich
  • Member for 13 years, 10 months
  • Last seen more than a month ago
  • GitHub
  • Panorama City, Los Angeles, CA, USA
8 votes

Why need the morphisms to form a set ?

6 votes

Gluing perverse sheaves?

6 votes

What is the opposite category of the category of modules (or Hopf algebra representations)?

6 votes

Fiber functor of category of D-module on affine Grassmannian.

6 votes

Are there proofs that you feel you did not "understand" for a long time?

6 votes

Objects which can't be defined without making choices but which end up independent of the choice

6 votes

Why do roots of polynomials tend to have absolute value close to 1?

5 votes
Accepted

Is orthogonal complement a rational map between Grasmannians?

5 votes

Are there any books that take a 'theorems as problems' approach?

5 votes

When are two operators simultaneously diagonalisable?

5 votes

Is the sum of two prime ideals in different polynomial rings, K[X_i] and K[Y_i] a prime ideal in K[X_i Y_i]?

5 votes

What do gerbes and complex powers of line bundles have to do with each other?

5 votes

How does one motivates the method of separation of variables when teaching PDE's?

5 votes

Why is differentiating mechanics and integration art?

5 votes

What do poles of differentials on a curve mean?

4 votes
Accepted

The definition of a group object is wrong?

4 votes

How do you switch between representations of an algebraic group and its Lie algebra?

4 votes
Accepted

Is there a name for this map induced by bilinear forms?

4 votes

Is there a "mathematical" definition of "simplify"?

4 votes

Radical of annihilator of a module

3 votes
Accepted

Coherence for pull-backs and push-forwards

3 votes

Does push forward commute with taking dual?

3 votes

Rationality of algebraic groups

3 votes
Accepted

Positivity of sequences via generating series

3 votes

What are your experiences of handouts in mathematics lectures?

3 votes

bounded t structure

3 votes

Homology or cohomology?

3 votes
Accepted

What would be an "arrows-only" defintion of a product in a category?

2 votes

Justifying the definition of arclength

2 votes

Making sure that you have comprehended a concept