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Apr
29
reviewed Leave Open Statistics Problems, I don't understand what this means..
Apr
29
answered Collection all cards in a cardgame
Apr
29
comment If $n$ is composite, then $((n-1)!)^2 \equiv 0 \pmod n$
4 is the only counterexample: see e. g. Benoit Cloitre's comment at oeis.org/A046022
Apr
29
reviewed Looks OK Evaluate $\lim _{n\to \infty }\int_1^2\:\frac{x^n}{x^n+1}dx$
Apr
29
reviewed Looks OK Show that there exists an idempotent element such that $Ra=Re$ holds for ring $R$
Apr
29
reviewed Approve $\int_{-1}^1 \int_{-1}^1 \sqrt{\frac{1+x-y-xy}{1-x+y-xy}} \, dx\,dy $
Apr
29
reviewed Approve Vector Space Basis' Proof
Apr
29
reviewed Leave Open High-School level probability and logic problem
Apr
29
reviewed Close How to construct a product set whose complement is not a product set?
Apr
29
reviewed Close Let A be a countable set of points on the plane. Prove that the remaining part of the plane is connected.
Apr
29
reviewed Leave Open Mean and variance of a random variable whose distribution is Pr {X = k} = Binomial [N-k, n] *Binomial [k-1,n] /Binomial [N, 2n+1] for k=n+1, …, N-n
Apr
29
reviewed Leave Open How to understand why $x^0 = 1$, where $x$ is any real number?
Apr
29
reviewed Leave Open Least integer function and Greatest Integer Function Without using ceil() and Floor()
Apr
29
reviewed Leave Open Measure space $(X,\mathcal{F},\mu)$ where $L^p(X,\mathcal{F},\mu) \neq L^q(X,\mathcal{F},\mu)$ if $p\neq q$
Apr
28
comment Find the probability of the following event
This, with slightly different numbers, is Kahneman and Tversky's taxicab problem: en.wikipedia.org/wiki/…
Apr
27
answered Algebraic simplification of likelihood ratio
Apr
17
answered How to evaluate $\log x$ to high precision “by hand”
Apr
10
comment Compute $\sqrt[7]{0.999}$ to three decimal places.(From Gelfand's Algebra text.)
I don't agree with your assumption; my assumption is that Gelfand was looking for a smarter answer like mine, given that the numbers involved are so close to 1. (If he'd asked, say, to compute the cube root of 3.257, then I'd expect that he was looking for the long-multiplication answer.) But I can't prove this.
Apr
8
answered Compute $\sqrt[7]{0.999}$ to three decimal places.(From Gelfand's Algebra text.)
Mar
12
answered $X,Y,Z$ are i.i.d $U(0,1)$. What is $P(X+Y+Z > 1)$?