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 Feb18 comment Graph generated by Voronoi diagrams infortunately this isn't Delaunay triangulation, I think I should edit my question May11 comment Does $\operatorname{MSE}(\hat{\theta}) = \operatorname{Var}(\theta)+ \left(\operatorname{Bias}(\hat{\theta},\theta)\right)^2$? but what if it's random variable ? Mar19 comment What is sum of occurrences of zeros, at the end of integers, up to number $n$? @Erick Wong good point Mar19 comment What is sum of occurrences of zeros, at the end of integers, up to number $n$? @JB King good point, sometimes strange things happen aroud the zero :) Mar19 comment What is sum of occurrences of zeros, at the end of integers, up to number $n$? yes, but what about closed form solution ? it seems to have something to do with n(n+1) sum ? Mar11 comment Checking Sudoku - sufficient sums yes integers hjk,hj Mar11 comment Checking Sudoku - sufficient sums ok I have not answer but information that make my question invalide math.stackexchange.com/questions/157682/… my condition could be substituted by taking sums of 2^value, but I'm not sure on 100% Mar6 comment Are there any Heron-like formulas for convex polygons? I've wrote that. Feb22 comment Might such a sequence of mathematical expectations be able to predict uncertain events? but what about $\delta^{bis}_{2}:=E(\big|-|X-E(X)|-\delta_1\big|)$ it's the symmetric part of the situation? Feb22 comment Minimize combined variance of multiple measurements with known (but varying) variance "The measurements are of course correlated (as they measure the same property)! And I can also calculate a covariance matrix..." but do you suppose that errors of measurements are also correlated ? Feb21 comment What is closed-form expression for $F(n)$ when $F(n)=F(n-1)+F(n-2)$ and $F(0)=a$,$F(1)=b$ and $a,b>0$? as I thought, but is there way to effectively search for them ? Feb21 comment What is closed-form expression for $F(n)$ when $F(n)=F(n-1)+F(n-2)$ and $F(0)=a$,$F(1)=b$ and $a,b>0$? How to find a and b, if I have only given value of F(n) (without knowledge of n) ? Feb21 comment What is closed-form expression for $F(n)$ when $F(n)=F(n-1)+F(n-2)$ and $F(0)=a$,$F(1)=b$ and $a,b>0$? great, I have value of $F(n)$ and have to find smallest $a,b>0$ your answer is going to be very helpful Feb14 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 Feb13 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 Jan28 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 $f(U,Z)$ ? $f(U,Z)=?$ Jan28 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 $p(z)$ ? $N(0,1)$ ? Jan23 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 ? Jan23 comment Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices. @Rahul Narain I've edited my question Aug15 comment Is addition more fundamental than subtraction? @Ben Millwood good point !!! :) ps. I cant edit my comments, and there are some misstakes