393 reputation
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visits member for 2 years, 5 months
seen Jul 8 at 18:56

Apr
14
asked Introductory book about economic models with deterministic chaos
May
10
asked Does $\operatorname{MSE}(\hat{\theta}) = \operatorname{Var}(\theta)+ \left(\operatorname{Bias}(\hat{\theta},\theta)\right)^2$?
Mar
20
asked Is there efficient way of finding last number in following sequence
Mar
19
asked For which minimal $k$ true is that ${4}^{k}\cdot n\leq \displaystyle\sum^{n}_{i=1}{a}_{i}^{k}\leq {5}^{k}\cdot n$, ${a}_{i}\in {1,2,3,4,5,6}$?
Mar
19
asked What is sum of occurrences of zeros, at the end of integers, up to number $n$?
Mar
11
asked Checking Sudoku - sufficient sums
Mar
6
asked Are there any Heron-like formulas for convex polygons?
Feb
25
asked Is the Fujiwara bound the most precise bound on maximum absolute value of complex roots of real polynomials?
Feb
22
answered Might such a sequence of mathematical expectations be able to predict uncertain events?
Feb
21
asked 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 $a,b>0$?
Feb
13
asked What is the distribution of empirical covariance between two independent normal distributions?
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
asked Find $C$, if $A=CBC$, where $A$,$B$,$C$ are symmetric matrices.
Aug
8
asked What is the sum of $\sum\limits_{i=1}^{n}i^k p^i$?
Aug
8
asked What is the sum of $\sum\limits_{i=1}^{n}ip^i$?
Jul
20
asked What is $f(t)=X_{t+1}$, if $X_{t+1}=(1-p)(1-X_{t})+pX_{t}$ and $X_{0},p \in [0,1]$?
May
17
asked What is the number of functions $f : A\rightarrow A, \forall_{x\in{A}} f(f(x))=x$, set $A$ have $n$ distinct elements.
May
14
asked Is $M=\{(x,y)\in (0,\infty )\times\mathbb{R} : y=\sin(\frac{1}{x}) \}$ a closed set in space $((0,\infty )\times\mathbb{R} ,\rho_{e})$?
May
9
asked Find all limit points of $M=\left \{ \frac{1}{n}+\frac{1}{m}+\frac{1}{k} : m,n,k \in \mathbb{N} \right \}$ in space $(M,\rho_{e})$