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Sunni
  • Member for 12 years, 6 months
  • Xianyang
29 votes
9 answers
5k views

Is there a good reason why $a^{2b} + b^{2a} \le 1$ when $a+b=1$?

28 votes
16 answers
4k views

Particular problem solved by solving a more general problem.

26 votes
2 answers
2k views

Is there a combinatorial interpretation of the identity $\sum_{k=0}^m 2^{-2k} \binom{2k}{k} \binom{2m-k}{m} =4^{-m} \binom{4m+1}{2m}$?

17 votes
5 answers
2k views

How to prove a known inequality from a book

8 votes
5 answers
2k views

A plausible inequality

8 votes
2 answers
2k views

A question on a trace inequality

8 votes
1 answer
309 views

Positivity of a rational function

7 votes
8 answers
2k views

Examples of inequality implied by equality.

7 votes
2 answers
479 views

The odd power of copositive matrix

6 votes
1 answer
958 views

Eigenspace of Euclidean distance matrix.

6 votes
1 answer
542 views

On a positivity of a matrix with trace entries.

5 votes
2 answers
385 views

How to find a solution to a particular Bottcher equation

5 votes
1 answer
1k views

Ask some matrix eigenvalue inequalities.

4 votes
1 answer
388 views

Ask the validity of a scalar inequality

4 votes
2 answers
277 views

Spectral order of copositive matrices

4 votes
1 answer
308 views

Explanation of a proof of an determinant bound?

4 votes
2 answers
675 views

Another plausible inequality.

3 votes
5 answers
9k views

What is the angle between two complex vectors?

3 votes
2 answers
2k views

a matrix similarity problem.

3 votes
2 answers
912 views

What's known about the 3rd coefficient in the BMV conjecture?

3 votes
1 answer
530 views

A question on star-congruence.

2 votes
2 answers
2k views

How covariance-variance inequality implies Kantorovich inequality

2 votes
2 answers
494 views

Decreasing coefficients?

2 votes
1 answer
371 views

What is the partial derivative in this expression?

2 votes
1 answer
428 views

A question on matrix decomposition.

1 vote
1 answer
362 views

A matrix with trace entries.

1 vote
3 answers
373 views

monotonicity from 4 term-recursion.

0 votes
1 answer
505 views

Is this trace inequality true?