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Apr
1
revised Simple question about inequality involving eigenvalue of a matrix and a scaled version of that matrix
edited body
Mar
30
revised Simple question about inequality involving eigenvalue of a matrix and a scaled version of that matrix
edited body
Mar
29
comment Simple question about inequality involving eigenvalue of a matrix and a scaled version of that matrix
It is fixed. Sorry for the typos.
Mar
29
revised Simple question about inequality involving eigenvalue of a matrix and a scaled version of that matrix
fixed typos
Mar
29
revised Simple question about inequality involving eigenvalue of a matrix and a scaled version of that matrix
edited body; edited tags; edited title
Mar
28
asked Simple question about inequality involving eigenvalue of a matrix and a scaled version of that matrix
Feb
7
revised mixture of multivariate Gaussians is elliptical?
added 88 characters in body
Feb
7
comment mixture of multivariate Gaussians is elliptical?
Can you be specific? Maybe write an answer? The link you showed seemed to suggest that linear combinations of elliptical functions were elliptical. If this is true than my second question remains.
Feb
7
comment mixture of multivariate Gaussians is elliptical?
I think maybe your question was whether I was taking a convolution or a mixture. I am taking a mixture.
Feb
7
comment mixture of multivariate Gaussians is elliptical?
The point is that you are drawing with probability $p$ from one distribution, and with probability $(1-p)$ from the other distribution. As I understand it this is called a mixture distribution. So my first question is whether this mixture of Gaussians is elliptical (it cannot be Gaussian). And if so how can we express it explicitly by the definition of an elliptical distribution.
Feb
7
revised mixture of multivariate Gaussians is elliptical?
added 327 characters in body
Feb
7
comment mixture of multivariate Gaussians is elliptical?
I don't understand the distinction, perhaps. We are drawing points/vectors from these distributions. I will shortly define elliptical distributions.
Feb
7
comment mixture of multivariate Gaussians is elliptical?
These are probability distribution. In particular they are en.wikipedia.org/wiki/Multivariate_normal_distribution
Feb
7
revised mixture of multivariate Gaussians is elliptical?
added 30 characters in body
Feb
7
asked mixture of multivariate Gaussians is elliptical?
Oct
8
accepted General question about matrix calculus with specific example (with attempted answer)
Oct
4
comment General question about matrix calculus with specific example (with attempted answer)
I already solved this example in my question. It was the general case ($p\neq 2$ that bothered me).
Oct
4
comment General question about matrix calculus with specific example (with attempted answer)
Yes, the last edit.
Oct
4
comment General question about matrix calculus with specific example (with attempted answer)
Thanks, this looks right. But then what is the flaw in my last argument for what the derivative should be?
Oct
4
revised General question about matrix calculus with specific example (with attempted answer)
added 257 characters in body; edited title