Nathan Portland

Member for 12 years
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linear-algebra

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Questions

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20

$A_6 \simeq \mathrm{PSL}_2(\mathbb{F}_9) $ only simple group of order 360

Sep 19, 2011

15

Show that $\max _{x \in[-1,1]}|P(x)| \geq \frac{1}{2^{n-1}}$ without Chebyshev polynomials

Aug 8

12

Embeddings of finite groups into $\mathrm{GL}_n(\mathbb{Z})$

Oct 8, 2011

11

Eigenvalues of doubly stochastic matrices

Nov 9, 2011

11

Algebraically closed field with characteristics $0$ versus $\mathbb{C}$

Feb 16, 2012

Answers

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58

Do matrices $ AB $ and $ BA $ have the same minimal and characteristic polynomials?

Feb 22, 2013

20

Order of product of two elements in an abelian group

Oct 10, 2011

6

Question about negative matrix involution

Oct 26, 2011

6

The cardinality of the group $\mathrm{SL}(k,\mathbb{Z}/n\mathbb{Z})$

Feb 23, 2014

4

A sufficient condition for diagonalization

Feb 21, 2013

Tags

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linear-algebra

68

Score

12

posts

matrices

65

Score

7

posts

minimal-polynomials

58

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1

post

characteristic-polynomial

58

Score

1

post

group-theory

28

Score

9

posts

Reputation

+40

Confinement result for unit complex numbers

+88

Show that $\max _{x \in[-1,1]}|P(x)| \geq \frac{1}{2^{n-1}}$ without Chebyshev polynomials

+10

Order of product of two elements in an abelian group

+10

Block matrices rank inequality

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