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Marcel's user avatar
Marcel's user avatar
Marcel
  • Member for 11 years
  • Last seen more than a week ago
6 votes

Proving the curl of a gradient is zero

5 votes
Accepted

Sum of the series $\sum_{n=0}^{\infty} \frac{1}{4^n(2n+1)}$

5 votes
Accepted

Using QR decomposition to generate small random rotations?

5 votes
Accepted

What is the probability that for two randomly chosen natural numbers $a$ and $b$ the number $\frac {a}{b}$ is natural?

5 votes

How many ways are there to arrange the digits $1$ through $9$ a $3 \times 3$ grid with restrictions?

5 votes
Accepted

Probability density function invariant under $x\mapsto 1/x$

5 votes

Uniqueness of the QR-factorization

4 votes
Accepted

Solving $n$th order determinant

4 votes

pseudovectors and covectors

4 votes

Applications of partitions of natural numbers

4 votes

Asymptotic expansion of Legendre polynomial

3 votes
Accepted

basic intuition of fundamental groups

3 votes
Accepted

Dropping Marbles into a Cone

3 votes
Accepted

Perimeter of circumference using Laplace transform

3 votes
Accepted

How many combinations have the same amount of ones and zeros?

3 votes

Does $\mathbf{u}^T \mathbf{J}\mathbf{u}= N\lambda_{\mathrm{max}}$ imply that $\mathbf{u}$ is the 'largest' eigenvector?

3 votes

Permutation count in cycle graphs

2 votes
Accepted

Green's functions and Fredholm equations

2 votes

Integral involving Legendre polynomials

2 votes

How to prove a polynomial can be written as Taylor-style?

2 votes

Factoring to find Power Series and Radius of Convergence

2 votes
Accepted

$a_{A,B}=a_{A,E}+a_{E,B}$ - Relative acceleration

2 votes
Accepted

Integral over unitary group: show that $\int_{U(N)} dU\, U_{ij}U_{kl}^\dagger=\frac{1}{N}\delta_{il}\delta_{jk}$

2 votes
Accepted

Where should the Lorentz transformations fit into this?

2 votes
Accepted

Using linear algebra to find resonance frequency and normal oscillations and motion

1 vote
Accepted

Understanding the notation to directly calculate $e^{ad_{X}}Y$

1 vote
Accepted

Rotation invariant bilinear form

1 vote

Equivalent matrices represent the same linear map in different bases

1 vote
Accepted

sum of roots of unity multiplied by k+1

1 vote
Accepted

Find all permutations such that $\sigma=a\tau a^{-1}$