johnnycrab

Member for 9 years, 1 month
Last seen more than a week ago

Summary

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abstract-algebra

27/100 score

17/20 answers

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12

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Answers

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Score Activity Newest

21

RQ decomposition

Feb 4, 2016

7

Show $\begin{pmatrix} 5 & 1 \\ -6 & 0 \end{pmatrix}$ and $\begin{pmatrix} 7 & -5 \\ 4 & -2 \end{pmatrix}$ are similar.

Mar 25, 2016

5

Computing the derivative of a matrix-vector dot product

Feb 18, 2018

4

Tensor product that is not $0$

Apr 11, 2018

4

Proof that $[\Bbb{Q}(\sqrt{q_1},\dots,\sqrt{q_r}):\Bbb{Q}]=2^r$

Mar 8, 2016

Questions

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Score Activity Newest Views

6

Cancellation in quotient of fractional ideals

Nov 11, 2016

6

Non-zero-divisor in quotient ring: Not a unit over minimal prime?

Jun 10, 2019

5

Proving 20-th cyclotomic field has class number one.

Jan 17, 2017

4

Kapranov's Theorem for tropical hypersurfaces: Understanding closure

Mar 28, 2017

4

$p$ prime, $G$ group of order $2p$, normal subgroup $N$ of order $2$. Show that $G$ is Abelian.

Oct 24, 2015

Tags

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linear-algebra

36

Score

13

posts

matrices

35

Score

7

posts

abstract-algebra

27

Score

18

posts

matrix-decomposition

21

Score

1

post

field-theory

10

Score

3

posts

Reputation

+10

Cancellation in quotient of fractional ideals

+40

RQ decomposition

+10

Group of order 6 contains an element of of order 3

+10

Conductor of a subring

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Mar 22, 2016
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Oct 23, 2018
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May 19, 2017
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Mar 30, 2017
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Nov 18, 2016

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3

downvotes

21

question votes

33

answer votes