Qbik
Reputation
398
Top tag
Next privilege 500 Rep.
Access review queues
 Mar19 reviewed Approve For which minimal $k$ true is that ${4}^{k}\cdot n\leq \displaystyle\sum^{n}_{i=1}{a}_{i}^{k}\leq {5}^{k}\cdot n$, ${a}_{i}\in {1,2,3,4,5,6}$? Mar19 revised For which minimal $k$ true is that ${4}^{k}\cdot n\leq \displaystyle\sum^{n}_{i=1}{a}_{i}^{k}\leq {5}^{k}\cdot n$, ${a}_{i}\in {1,2,3,4,5,6}$? refined TeX Mar19 asked For which minimal $k$ true is that ${4}^{k}\cdot n\leq \displaystyle\sum^{n}_{i=1}{a}_{i}^{k}\leq {5}^{k}\cdot n$, ${a}_{i}\in {1,2,3,4,5,6}$? Mar19 comment What is sum of occurrences of zeros, at the end of integers, up to number $n$? @Erick Wong good point Mar19 accepted What is sum of occurrences of zeros, at the end of integers, up to number $n$? 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 ? Mar19 asked What is sum of occurrences of zeros, at the end of integers, up to number $n$? 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% Mar11 asked Checking Sudoku - sufficient sums Mar6 comment Are there any Heron-like formulas for convex polygons? I've wrote that. Mar6 asked Are there any Heron-like formulas for convex polygons? Feb25 asked Is the Fujiwara bound the most precise bound on maximum absolute value of complex roots of real polynomials? Feb22 revised Might such a sequence of mathematical expectations be able to predict uncertain events? added 51 characters in body Feb22 answered Might such a sequence of mathematical expectations be able to predict uncertain events? 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) ?