Tiffany Hwang

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13 Questions

views newest activity votes

11

32

votes

4

answers

1

kviews

What kind of work do modern day algebraists do?

abstract-algebra group-theory soft-question ring-theory field-theory

aug 16 at 15:15 Will Knott 1

6

12

votes

3

answers

202

views

If $C$ commutes with certain matrices $A$ and $B$, why is $C$ a scalar multiple of the identity?

linear-algebra matrices

mar 11 at 15:20 user1551 16.7k

1

9

votes

4

answers

230

views

Example that the Jordan canonical form is not “robust.”

linear-algebra abstract-algebra matrices

mar 19 at 7:15 copper.hat 28.5k

2

8

votes

2

answers

151

views

Why is $\mathbb{H}\otimes\mathbb{H}\cong\text{End}_\mathbb{R}\mathbb{H}$?

tensor-products quaternions

mar 23 '12 at 22:56 Eric O. Korman 7,550

1

4

votes

1

answer

141

views

Specific proof that any finitely generated $R$-module over a Noetherian ring is Noetherian.

abstract-algebra ring-theory modules

feb 17 at 22:00 Boris Novikov 4,811

3

votes

1

answer

192

views

Any nonabelian group of order $6$ is isomorphic to $S_3$?

abstract-algebra group-theory finite-groups

jun 4 '12 at 4:26 Arturo Magidin 158k

3

votes

3

answers

93

views

Are the $\mathbb{Z}/p^k\mathbb{Z}$ simple modules all isomorphic to one another?

abstract-algebra reference-request ring-theory modules

apr 29 '12 at 6:00 Patrick Da Silva 13.5k

2

votes

1

answer

60

views

Is $A^{q+2}=A^2$ in $M_2(\mathbb{Z}/p\mathbb{Z})$?

linear-algebra abstract-algebra matrices

jun 16 '12 at 18:23 Arturo Magidin 158k

2

votes

1

answer

128

views

On Weyl algebras and their centers over fields of positive characteristic.

abstract-algebra

apr 11 '12 at 8:21 Tiffany Hwang 374

1

vote

1

answer

21

views

If $u$ and $v$ have the same order, $u=f(\tau)(v)$ iff $v=g(\tau)(u)$?

abstract-algebra polynomials modules

mar 6 at 5:09 anon 40k

1

vote

1

answer

63

views

Is there a unique cyclic submodule for every factor dividing the order of a cyclic module?

linear-algebra abstract-algebra modules

feb 26 at 22:33 Tiffany Hwang 374

1

vote

1

answer

77

views

If every linear functional is continuous in $V$, is every linear functional continuous for $S\subseteq V$?

topological-vector-spaces

dec 16 at 12:58 Michael Greinecker♦ 12.5k

1

vote

3

answers

102

views

Are vector subspaces of $\mathbb{R}^n$ always closed?

linear-algebra topological-vector-spaces

nov 28 at 9:30 Hagen von Eitzen 42.7k

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