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Quantum spaghettification's user avatar
Quantum spaghettification's user avatar
Quantum spaghettification
  • Member for 9 years, 3 months
  • Last seen this week
  • Somewhere between earth and andromeda.
6 votes

The definition of direct sums and subspaces?

4 votes
Accepted

Short way to find the grad, curl and div in curvilinear coordiantes?

2 votes
Accepted

Rank of two linear functions

2 votes
Accepted

Simultaneously block diagonalizing two $4\times 4$ matrices?

1 vote

Young Diagrams, singlets and ignoring the first column

1 vote

Convergence of the Integral $\int d^d k \frac{1}{k^2}\exp\left({i\vec k \cdot \vec r}\right)$.

1 vote

Do branch cuts need to be lines?

1 vote

How to prove that a linear operator acting on a null ket produces a null ket?

1 vote

Different meanings of 'an algebra'?

1 vote

Bessel function why decide to ignore odd terms?

1 vote

Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$

1 vote

Short way to find the grad, curl and div in curvilinear coordiantes?

1 vote

Shape of universe from the metric's scalar factor

0 votes

Determine if $f(z)$ has a branch point where it is not analtyic?

0 votes
Accepted

Showing that $O(o(f))=o(O(f))=o(g)$ if $f=O(g)$

0 votes

Relation of $\det(M(x)\delta(x-y))$ to $\det(M(x))$?