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3h
comment Clustering elements according to covariance matrix
I'm also not sure, if this question would be better placed at http://stats.stackexchange.com/? If so, could it be transferred by a moderator?
4h
comment Clustering elements according to covariance matrix
Thank you very much. The term LDA popped up in my search as well. I will definitely give this a closer look.
7h
asked Clustering elements according to covariance matrix
May
18
comment Relation between Laplace and Fourier transform
Don't I have a problem with 311, since it assumes that the power is positive ?
May
17
comment Relation between Laplace and Fourier transform
I think I remember a similar expression for the transform of the Mittag Leffler function, however I don't know how to inverse transform $|s|^r$. Is there a relation for this type of expression?
May
5
comment Green's function for fractional operators
I know this question is 3 years old, but I think I need the paper dealing with $-\Delta^s u + u$ by Kenig et al. However, your links are dead. Do you happen do know the sources? That would be great!
May
5
asked Relation between Laplace and Fourier transform
Apr
30
comment Why sum of two little “o” notation is equal little “o” notation from sum?
Do you know what the little $o$ notation means?
Apr
2
comment the 2D fractional Gaussian noise as derived from the 2D fractional Brownian motion
Does this help?
Mar
26
comment transfer matrices times a real-valued matrix in Matlab
Just a quick info, typing help ss or doc ss in the command line might give you some hints.
Mar
24
asked Spectral convergence for collocation methods
Mar
12
accepted Fast projection of multiple points on a line
Mar
12
comment Fast projection of multiple points on a line
Thanks, but I think for an efficient computation, the first approach is faster, since I only need two matrix-vector multiplication (assuming that $s$ is normalized).
Mar
12
asked Fast projection of multiple points on a line
Mar
4
comment Regularity of the function $|x|^ax$
You might want to check the cases in your first equation, there should probably be $a<0$ once.
Feb
27
accepted Book request: Mathematical Finance, Stochastic PDEs
Feb
25
comment How to solve this limit, normal methods result in zero. Online sources say otherwise.
Are you sure this is posted correctly? Because the limit is not 3/2 for your question.
Feb
25
comment Solve integral including Bessel function numerically in matlab
I tried you code and it works, however using quadgk instead of integral seems to be 10x faster (I used Matlab 2014 and performed the computation 50 times). However, the results vary (difference is 1%) and both calculation yield warnings.
Feb
23
revised Sum of exponents equals delta function
added 1 character in body
Feb
21
comment Gram-Schmidt to prove recurrence relation of orthonormal polynomials
This is the recurrence relation for orthonormal polynomials.