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An expert is a man who has made all the mistakes, which can be made, in a very narrow field. (Niels Bohr)


2d
reviewed Approve Can this be rewritten as the following?
Dec
16
reviewed Approve Can I demonstrate that this final sum is natural number?
Dec
7
reviewed Close How to calculate the probability of busting in Black Jack?
Dec
7
reviewed Reject A mapping from $\mathbb R^n$ to $\mathbb R^m$ that does not increase distances
Dec
7
reviewed Approve Absolutely continuous function and differentiability
Dec
6
reviewed Close Discrete Mathematics in KhanAcademy
Dec
6
reviewed Close Find $\int _{-\infty}^{\infty}\frac{1}{x^{12} + 1} dx$ elementarily
Dec
6
reviewed Leave Open How to find the equation of a hyperplane in $\mathbb R^4$ that contains $3$ given vectors
Dec
6
reviewed Close Can I get a little integral help?
Dec
6
reviewed Close Is it true that $A \geq B$ implies $\|A\|_2 \geq \|B\|_2$ for $A,B \geq 0$?
Dec
6
reviewed Close Finitely generated modules
Dec
6
reviewed Leave Open Show $\lim_{n\to\infty}\frac{\int_X|f|^{n+1}d\mu}{\int_X|f|^nd\mu}=\|f\|_\infty$.
Dec
6
reviewed Close Show that $\mathbb{Z}_n$ is local ring iff $n$ is a power of a prime number
Dec
6
reviewed Close 4th grade word problem
Dec
5
reviewed Close prove that $\sum_{n=0}^{\infty} \frac{x^n}{n!} > 0$
Dec
5
reviewed Close Is the series $\sum_{1}^{\infty}\frac{1}{p_{j}}$ where $p_{j}$ is the $j$th prime convergent?
Dec
5
reviewed Close Finding matrix for given recurrence
Dec
5
reviewed Close Find the conditional expectation $E[X|X\wedge t]$
Dec
5
reviewed Close What is the probability $X+Y=0$ for two independent Poisson random variables?
Dec
5
reviewed Close Find a constant $c$ (if it exists) such that $Y_n \xrightarrow{P} c$. Does $Y_n \xrightarrow{a.s.} c$?