Tiffany Hwang

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13 Questions

views newest activity votes

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230

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

linear-algebra abstract-algebra matrices

mar 19 at 7:15 copper.hat 28.5k

6

12

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3

answers

202

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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 16.8k

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vote

1

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21

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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 40.3k

1

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1

answer

63

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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

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4

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1

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141

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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 4,921

1

vote

1

answer

77

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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♦ 12.6k

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3

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102

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

linear-algebra topological-vector-spaces

nov 28 at 9:30 Hagen von Eitzen 43k

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32

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4

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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

2

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1

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60

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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

3

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1

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192

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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

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3

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93

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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

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128

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

abstract-algebra

apr 11 '12 at 8:21 Tiffany Hwang 374

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8

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151

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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 7,570

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