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Josephine Moeller's user avatar
Josephine Moeller's user avatar
Josephine Moeller's user avatar
Josephine Moeller
  • Member for 13 years, 10 months
  • Last seen more than a month ago
44 votes
Accepted

Probability that n points on a circle are in one semicircle

17 votes
Accepted

The form of $2 \times 2$ unitary matrices

16 votes

Taking derivative of $L_0$-norm, $L_1$-norm, $L_2$-norm

13 votes
Accepted

Why is Gimbal Lock an issue?

11 votes
Accepted

How to invert sum of matrices?

8 votes
Accepted

Convexity of log det X???

8 votes

L1 norm and L2 norm

7 votes
Accepted

Why is $3^n$ not in $\Theta(2^n)$

7 votes

Convex implies not subadditive

7 votes
Accepted

Isolate middle value from $3\times 3$ matrix

5 votes

Fast way to calculate Eigen of 2x2 matrix using a formula

4 votes
Accepted

Solving equation $A^{(B^{(C^x)})} = C^{(B^{(A^x)})}$ for $x$

4 votes

Multilinear Functions

4 votes
Accepted

Trace of a matrix times outer product

4 votes

Exponents and rationals

3 votes

Prove inequality with two variables

3 votes

Find in terms of $p$, $\tan(-\alpha)$, $\tan(\pi - \alpha)$ and $\tan(\frac{\pi}{2}-\alpha)$.

3 votes

If $X$ and $X-Y^TXY$ are symmetric positive definite, then $\max{|\lambda_i(Y)|<1}$

3 votes

Is there a bijection between $\mathbb N$ and $\mathbb N^2$?

2 votes
Accepted

Multivariate proof using chain rule I think

2 votes
Accepted

How to show $\sin(-iy)=i\sinh(y)$?

2 votes
Accepted

How does one derive this rotation quaternion formula?

2 votes

Does the Cycle Property hold when edges values are non distinct?

2 votes

Finding an expression for nth derivative

2 votes

Given the SVD of $A$, what's the SVD of $A^*$?

2 votes

how to solve a system with more equations than unkowns?

2 votes

Show that $\lim_{n\rightarrow\infty} A ^{n} = B$

2 votes
Accepted

How to draw a hyperbola?

2 votes
Accepted

kernels to compute second order derivative of digital image

2 votes

Is $xy = 1$ connected ?