Skip to main content
Quantum spaghettification's user avatar
Quantum spaghettification's user avatar
Quantum spaghettification's user avatar
Quantum spaghettification
  • Member for 9 years, 4 months
  • Last seen more than a week ago
  • Somewhere between earth and andromeda.
28 votes
3 answers
11k views

Why is a linear transformation a $(1,1)$ tensor?

15 votes
3 answers
15k views

The definition of direct sums and subspaces?

10 votes
2 answers
18k views

What is a necessary and sufficient condition for a Taylor series to exist?

9 votes
1 answer
910 views

Books to read before learning representation theory?

8 votes
1 answer
1k views

Integral Representation of Dirac Delta on a Manifold

7 votes
1 answer
423 views

Counting to $P$ game - strategy?

6 votes
2 answers
88k views

Counting to 21 game - strategy?

6 votes
1 answer
14k views

Is $\sqrt{z}$ an analytic function?

5 votes
1 answer
240 views

Boundary conditions for Green's function?

5 votes
2 answers
752 views

When does a line integral equal an ordinary integral?

5 votes
0 answers
139 views

Angle between two curves at infinity?

5 votes
4 answers
1k views

Equation of a Riemann surface?

5 votes
1 answer
7k views

Pitchfork Bifurcation - subcritical and supercritical?

5 votes
3 answers
1k views

Books on Perturbation Methods

5 votes
2 answers
72 views

If $\left< e^{-x}\right>=1$ then $\left<x\right>\ge 0$.

4 votes
1 answer
699 views

Differentiation under the integral sign - line integral?

4 votes
2 answers
67 views

Why are all open subsets not infinite in extent?

4 votes
1 answer
242 views

In Fourier transform why does the quantity $[fe^{-ikx}]^{\infty}_{-\infty}=0$?

4 votes
2 answers
422 views

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

4 votes
1 answer
704 views

Proving a modified version of Jordan's lemma?

4 votes
2 answers
447 views

Definition of a esssential singularity - equivalence?

3 votes
0 answers
57 views

Singularity at inifnity?

3 votes
2 answers
411 views

When is $\frac{dx}{dt}=\frac{\Delta x}{\Delta t}$ a valid approximation?

3 votes
4 answers
2k views

Is Fourier transform a generalisation of Fourier series?

3 votes
1 answer
799 views

For what $r$ does the Lorenz attractor exist?

3 votes
1 answer
6k views

Difference between duality pairing and natural pairing?

3 votes
1 answer
211 views

For $\Bbb{K}[[x]]$ what and where is $x$ in $\sum_{n=0}^\infty a_nx^n$?

3 votes
1 answer
98 views

Different meanings of 'an algebra'?

3 votes
3 answers
2k views

Definition of a branch of a complex function?

3 votes
0 answers
69 views

Equivalence of definitions of Markov Process.

1
2 3 4 5