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visits member for 2 years, 8 months
seen Aug 4 at 20:30

Feb
16
accepted How to obtain estimate of covariance matrix that will be guarantee to be semi-positive define?
Feb
14
comment What do $\pi$ and $e$ stand for in the normal distribution formula?
and if we take $\begin{align*}X&=\cos(2\pi V)\\Y&=\sin(2\pi V)\end{align*}$ and plot($X$,$Y$) we have beautiful circle
Feb
13
comment Can the matrices $A$ and $I+A$ have the same determinant?
det(A)=det(A+I)=0 if for all i and j, a[i,j]=0 except i=j=1 for which a[i,j]=-1
Feb
13
awarded  Critic
Feb
13
revised What is the distribution of empirical covariance between two independent normal distributions?
added 509 characters in body
Feb
13
asked What is the distribution of empirical covariance between two independent normal distributions?
Feb
7
awarded  Yearling
Jan
28
comment $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
what is $f(U,Z)$ ? $f(U,Z)=?$
Jan
28
comment $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
but what is $p(z)$ ? $N(0,1)$ ?
Jan
28
revised $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
deleted 61 characters in body
Jan
28
revised $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
added 7 characters in body; edited title
Jan
28
revised $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
edited tags
Jan
28
asked $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
Jan
27
asked How to obtain estimate of covariance matrix that will be guarantee to be semi-positive define?
Jan
23
comment Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
and could You tell me what would be the most intuitive assumption needed for obtaining unique solution if assumption "B is positive definite matrix" deosn't hold anymore ?
Jan
23
comment Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
@Rahul Narain I've edited my question
Jan
23
accepted Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
Jan
23
revised Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
deleted 367 characters in body
Jan
23
revised Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
idea of solution added
Jan
23
revised Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
idea of solution added