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breezeintopl
  • Member for 10 years, 6 months
  • Last seen more than a month ago
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21 votes
1 answer
88k views

How to calculate the expectation of $XY$?

12 votes
4 answers
10k views

Prove that $f:\mathbb R^n\to\mathbb R$ is affine if and only if it is convex and concave

6 votes
1 answer
283 views

Computing bases for direct, wedge, tensor products, etc., of given vector spaces

5 votes
1 answer
114 views

integration in five dimensions space

4 votes
1 answer
697 views

base for finite dimensional vector space is not infinite dimensional vector space?

4 votes
2 answers
2k views

example of infinite torsion abelian group

3 votes
1 answer
562 views

example for torsion-free but not cyclic group

3 votes
3 answers
214 views

positive definite of a matrix(diagonal decay)

3 votes
1 answer
198 views

Operator norm under shrinkage

3 votes
1 answer
2k views

Taylor Expansion of log determinant of a matrix

3 votes
1 answer
330 views

Describe the groups of homomorphisms of abelian groups

3 votes
1 answer
256 views

jordan canonical form with direct product?

3 votes
0 answers
206 views

How to get envelope ? How to express constant along a curve?

2 votes
2 answers
96 views

on the vector product

2 votes
2 answers
3k views

variance of the cdf with a jump

2 votes
1 answer
94 views

integration in five dimensions space part two

2 votes
0 answers
126 views

absolute continuous in two dimension

2 votes
2 answers
388 views

differential forms, stokes theorem in higher dimension

2 votes
1 answer
972 views

conjugacy classes of a matrix satisfies an equation

2 votes
3 answers
123 views

the order of a group of matrices over $\mathbb{Z}/2\mathbb{Z}$

2 votes
1 answer
217 views

volume of unit ball in high dimension with maximum norm

2 votes
1 answer
608 views

Kronecker product of two Hadamard matrices is Hadamard matrix

2 votes
1 answer
222 views

moving average of a matrix

2 votes
1 answer
371 views

Testing for decomposable tensors

2 votes
2 answers
456 views

Volume of a parallelepiped in $\mathbb{R}^4$

2 votes
1 answer
185 views

Find Jordan canonical form with Kronecker product

1 vote
2 answers
63 views

describe explicitly a subgroup $H$ of order 8 of the permutation group $S_5$

1 vote
2 answers
69 views

Determine the elements in $GL(3)$ and $SL(3)$ on $\mathbb{F}_p$

1 vote
0 answers
88 views

Find Jordan canonical form with Kronecker product of JCF

1 vote
2 answers
437 views

Matrix inequality and inner product