MathOverflow
Uriya First's user avatar
Uriya First's user avatar
Uriya First's user avatar
Uriya First
  • Member for 8 years, 2 months
  • Last seen this week
Profile Activity

33 Answers

Score Activity Newest
15 votes

Krull dimension of a local ring and completion

12 votes
Accepted

For every ring R, is there a block-diagonal canonical form for a square matrix over R?

10 votes
Accepted

Vector space objects in schemes - confusion

10 votes
Accepted

PID expressed as finite union of subrings

9 votes
Accepted

Is $K[[x_1,x_2,\dots]]$ an $\mathfrak m$-adically complete ring?

8 votes
Accepted

Each $w\in W$ can be expressed as product of distinct reflections?

8 votes
Accepted

Is every matrix involution over a UFD diagonalisable?

6 votes
Accepted

Finitely generated sheaf of algebras over geometric points

5 votes

Automorphic representations whose local factors are tempered almost everywhere

5 votes
Accepted

Are Azumaya algebras of trivial Brauer class isomorphic to $\mathcal{E}nd(\mathcal{H})$?

4 votes
Accepted

Injective indecomposable modules over Laurent polynomial rings

4 votes
Accepted

Projective dimension of graded modules

4 votes
Accepted

On the Artin-Rees Lemma for non-commutative rings

4 votes

Coproduct for a Frobenius algebra

3 votes

Level of a commutative ring and its quotient field

3 votes
Accepted

Does Noetherianity imply division theorem?

3 votes
Accepted

Automorphism of algebras with certain initial conditions on given idempotents

3 votes
Accepted

Splitting of short exact sequence in the category of finitely generated modules over a commutative Noetherian ring

3 votes
Accepted

Motivation to study the order theory (ring theory)

3 votes
Accepted

Dimension of a module over a left-Ore domain

3 votes
Accepted

What is K+M structure?

3 votes
Accepted

Integral structures via lattices

2 votes
Accepted

An explicit isomorphism between the 1st Cech cohomology and the 1st hypercohomology

2 votes
Accepted

Homomorphisms of ring extending nicely ideal intersections

2 votes

Vanishing of higher direct image of finite morphisms relative to the fppf topology

2 votes
Accepted

Existence of reduced norms for CSAs using fpqc descent

2 votes
Accepted

Is there a good notion of kernels of quadratic forms on abelian groups?

1 vote
Accepted

Do you know a finite unitary reversible ring that is not isomorphic to its opposite? And the minimal with that property?

1 vote
Accepted

Characteristic zero field with unique regular Noetherian dense unital subring

1 vote

Can elements in the orthogonal group of a non-split Azumaya algebra with an orthogonal involution have reduced norm -1?

1
2