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Kai's user avatar
Kai's user avatar
Kai
  • Member for 6 years, 8 months
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21 votes
2 answers
40k views

Solve this integral for free WiFi

4 votes
0 answers
157 views

If the boundary is adjoint to the differential, what is the "coboundary" adjoint to the codifferential in the continuum?

3 votes
1 answer
179 views

What sort of manifold does a periodic polygon make?

3 votes
1 answer
687 views

the difference between chains and cochains

3 votes
1 answer
1k views

Approximating optimal step size for numerical integrator

3 votes
1 answer
1k views

Crank-Nicolson for coupled PDE's

2 votes
1 answer
82 views

Analog of $C^{\infty}$ multiplication for discrete "vector fields"

2 votes
1 answer
42 views

Confusion about the behavior of $p$-simplices under "inversions" (reversing ordering of indices)

2 votes
1 answer
2k views

Adaptive Step Size in RK45 for Second-Order ODE

1 vote
1 answer
402 views

How to determine a basis for invariant subspaces transforming in the irreps of a finite group?

1 vote
0 answers
44 views

Finding a map between irreducible representations of finite groups

1 vote
2 answers
101 views

Given a sequence of head to tail vectors forming a closed loop, how can I determine if they form a knot? [closed]

1 vote
1 answer
1k views

Approximation of exp$(-a/x)$ near $x=0$

1 vote
0 answers
47 views

"Symbolic" relation between moments and cumulants

1 vote
0 answers
314 views

Eigenvalues and Eigenvectors of the Adjacency Matrix of the Line Graph of a Bipartite Lattice

0 votes
4 answers
67 views

Intuitive examples of distributions where the mean is far from the most probable outcome.

0 votes
1 answer
238 views

Inverting a matrix expressed with summation notation

0 votes
0 answers
166 views

Quickly estimating the optimal bin size for the Jackknife re-sampling method

0 votes
1 answer
178 views

Number of ways to choose a closed path of given length on a square lattice

0 votes
1 answer
465 views

Find a vector in the plane spanned by two 4D vectors

0 votes
2 answers
75 views

Examples of finitely differentiable manifolds