User Amritanshu Prasad

65 votes

What are your favorite instructional counterexamples?

answered Mar 23, 2013 at 9:44

43 votes

Why study Lie algebras?

answered Mar 17, 2011 at 4:14

19 votes

A slick proof of the Bruhat Decomposition for GL_n(k)?

answered May 2, 2012 at 17:25

19 votes

Accepted

Is a matrix similar to its transpose over $\mathbb{Z}_p$?

answered Dec 15, 2018 at 5:10

18 votes

Which mathematical ideas have done most to change history?

answered Mar 16, 2011 at 5:36

16 votes

Old books still used

answered Dec 29, 2012 at 1:30

15 votes

Examples of theorems misapplied to non-mathematical contexts

answered Jun 12, 2014 at 5:20

15 votes

Any good reference for Tits Building?

answered Aug 31, 2011 at 16:09

13 votes

Automorphism group of a finite group

answered Oct 16, 2013 at 3:42

12 votes

Geometric interpretation of trace

answered Jan 23, 2013 at 8:26

11 votes

Accepted

Does the linear automorphism group determine the vector space?

answered Nov 7, 2014 at 3:22

10 votes

Accepted

Rational Canonical Form over $\mathbb{Z}/p^k\mathbb{Z}$

answered Jan 31, 2018 at 14:54

10 votes

Video lectures of mathematics courses available online for free

answered Oct 14, 2011 at 8:25

10 votes

Accepted

Bruhat decomposition for G(R), R local ring or R=Z/p^r

answered Mar 9, 2011 at 8:18

10 votes

Suitable references for the the Stone-von Neumann Theorem

answered May 10, 2011 at 7:13

10 votes

Hecke-algebras in your field of mathematics

answered Nov 19, 2010 at 8:19

9 votes

Subgroups of a finite abelian group

answered Nov 17, 2010 at 3:58

9 votes

Accepted

Conjugation orbits in the square matrices

answered Mar 9, 2011 at 7:37

9 votes

Accepted

Branching Rule for alternating groups

answered Oct 23, 2018 at 5:11

9 votes

Accepted

Can monomial representations induced from nonmonomial representations?

answered Oct 10, 2014 at 3:54

8 votes

Accepted

how to find explicitly given component in a regular representation

answered Mar 24, 2015 at 6:54

8 votes

What does the adjective "natural" actually mean?

answered Mar 2, 2011 at 7:33

8 votes

Centralizer of a Matrix over a Finite Field

answered Aug 20, 2012 at 5:46

7 votes

Hall polynomial when the subgroup is cyclic?

answered Apr 29, 2012 at 2:25

7 votes

Sum of Gaussian binomial coefficients.

answered Dec 30, 2014 at 16:20

6 votes

Accepted

Reference request about the representations of the group $PSL_2(\mathbb{F}_q)$

answered Apr 19, 2015 at 2:33

6 votes

Provoking involutions further

answered Apr 17, 2017 at 4:43

6 votes

The product of non-commuting semisimple matrices need not be semisimple

answered Mar 8, 2011 at 8:39

6 votes

Definitions of Hecke algebras

answered Oct 4, 2010 at 8:31

6 votes

Accepted

checking if F[x]/I is isomorphic to F[x]/J

answered May 16, 2011 at 4:58

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72 Answers

What are your favorite instructional counterexamples?

Why study Lie algebras?

A slick proof of the Bruhat Decomposition for GL_n(k)?

Is a matrix similar to its transpose over $\mathbb{Z}_p$?

Which mathematical ideas have done most to change history?

Old books still used

Examples of theorems misapplied to non-mathematical contexts

Any good reference for Tits Building?

Automorphism group of a finite group

Geometric interpretation of trace

Does the linear automorphism group determine the vector space?

Rational Canonical Form over $\mathbb{Z}/p^k\mathbb{Z}$

Video lectures of mathematics courses available online for free

Bruhat decomposition for G(R), R local ring or R=Z/p^r

Suitable references for the the Stone-von Neumann Theorem

Hecke-algebras in your field of mathematics

Subgroups of a finite abelian group

Conjugation orbits in the square matrices

Branching Rule for alternating groups

Can monomial representations induced from nonmonomial representations?

how to find explicitly given component in a regular representation

What does the adjective "natural" actually mean?

Centralizer of a Matrix over a Finite Field

Hall polynomial when the subgroup is cyclic?

Sum of Gaussian binomial coefficients.

Reference request about the representations of the group $PSL_2(\mathbb{F}_q)$

Provoking involutions further

The product of non-commuting semisimple matrices need not be semisimple

Definitions of Hecke algebras

checking if F[x]/I is isomorphic to F[x]/J