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Rodrigo de Azevedo

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Top Questions
19 votes

What is the volume of the $3$-dimensional elliptope?

integration volume lmis spectrahedra semialgebraic-geometry asked Oct 16 '16 at 15:49
math.stackexchange.com

17 votes

Alternatives to the classical pendulum ODE

ordinary-differential-equations differential-geometry dynamical-systems classical-mechanics diffeomorphism asked Apr 20 '21 at 22:04
math.stackexchange.com

15 votes

Why don't rollbacks count as activity in my network profile?

support network-profile recent-activity rollbacks asked Sep 5 '20 at 22:34
meta.stackexchange.com

12 votes

Prove that $\nabla_{\mathrm X} \mbox{tr} (\mathrm A \mathrm X^{-1} \mathrm B) = - \mathrm X^{-\top} \mathrm A^\top \mathrm B^\top \mathrm X^{-\top}$

matrices derivatives matrix-calculus trace scalar-fields asked Sep 19 '16 at 18:07
math.stackexchange.com

11 votes

Why was the Soviet Naval Infantry disbanded in 1947?

military soviet-union cold-war reference infantry asked Apr 12 '20 at 17:16
history.stackexchange.com

10 votes

Why do Russian Su-30SM fighters have white nose radomes?

paint nose russia su-30 radome asked Sep 11 '21 at 12:23
aviation.stackexchange.com

9 votes

Why paint a British roundel on a non-British Lynx?

military helicopter uk aircraft-marking asked May 21 '21 at 17:05
aviation.stackexchange.com

8 votes

Writing a convex quadratic program (QP) as a semidefinite program (SDP)

optimization convex-optimization quadratic-programming semidefinite-programming lmis asked Apr 28 '17 at 13:22
math.stackexchange.com

6 votes

How did Soapy get to fly Hornets?

military aviation-history uk f-18 asked Jun 6 '21 at 17:14
aviation.stackexchange.com

6 votes

On the legality of replacing international transfers with intranational ones

banking money ixl money-laundering asked Sep 9 '20 at 10:32
law.stackexchange.com

1 2

Top Answers
89
Is "The empty set is a subset of any set" a convention?
math.stackexchange.com

75
Why are some coins Reuleaux triangles?
math.stackexchange.com

55
The relation between trace and determinant of a matrix
math.stackexchange.com

43
How to prove that a $3 \times 3$ Magic Square must have $5$ in its middle cell?
math.stackexchange.com

30
What is a real-world metaphor for irrational numbers?
math.stackexchange.com

29
Derivative of squared Frobenius norm of a matrix
math.stackexchange.com

21
Decomposition of a positive semidefinite matrix
math.stackexchange.com

21
Are there any issues with speaking Spanish as a tourist in Portugal?
travel.stackexchange.com

20
Are two sequences equal if the sums and sums of squares are equal?
math.stackexchange.com

20
Write $(x^2 + y^2 + z^2)^2 - 3 ( x^3 y + y^3 z + z^3 x)$ as a sum of (three) squares of quadratic forms
math.stackexchange.com

19
Systems of linear equations: Why does no one plug back in?
math.stackexchange.com

16
Why do positive definite matrices have to be symmetric?
math.stackexchange.com

15
Can a helicopter carry a large airplane?
aviation.stackexchange.com

15
Math without pencil and paper
math.stackexchange.com

15
Legality of downloading books from websites such as Library Genesis
academia.stackexchange.com

14
Is $f(x,y) = f(\mathbf{x})$ abuse of notation?
math.stackexchange.com

13
Approximation to unsolvable system of equations
math.stackexchange.com

13
Suppose $M$ is an $m \times n$ matrix such that all rows and columns of $M$ sum to $1$. Show that $m=n$
math.stackexchange.com

13
Find the determinant of $I + A$
math.stackexchange.com

12
Why do market-makers usually win against traders?
money.stackexchange.com

12
Analytical solution for kinetics of bimolecular reaction
chemistry.stackexchange.com

12
Matrix with the same value in all entries — which notation to use?
math.stackexchange.com

12
Calculating matrix exponential
math.stackexchange.com

12
How to take the gradient of the quadratic form?
math.stackexchange.com

12
Determinant of a $k \times k$ block matrix
mathoverflow.net

11
Applications of mathematics in clinical setting
mathoverflow.net

11
What are the possible concentration pathways for a 3-species system?
chemistry.stackexchange.com

11
Does gradient descent converge to a minimum-norm solution in least-squares problems?
math.stackexchange.com

11
Find large power of a non-diagonalisable matrix
math.stackexchange.com

11
Filling $4 \times 4$ matrix with Boolean values
math.stackexchange.com

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