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Yuval Filmus earned this badge 30 times |
apr 16 at 5:11
Finding the least element of the greatest elements of certain subsets of the natural numbers
jul 3 at 16:43
Do infinity and zero really exist?
jun 16 '12 at 22:13
What is the math behind the game Spot It?
apr 17 '12 at 0:07
a sequential game of dice
mar 9 '12 at 2:34
Cutting a unit square into smaller squares
feb 20 '12 at 23:37
How to generate REAL random numbers with some random and pseudo random
feb 2 '12 at 13:29
Starting digits of 2^n
jan 25 '12 at 8:46
why is $X^n\cdot X^m = X^{n+m}$
dec 12 '11 at 5:43
$\sum \limits_{n=1}^{\infty}n(\frac{2}{3})^n$ Evalute Sum
nov 12 '11 at 17:36
How to compute the formula $\sum \limits_{r=1}^d r \cdot 2^r$?
nov 3 '11 at 15:03
The easy(?) part of IMO 2011 Problem 3
oct 31 '11 at 21:36
Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$?
oct 30 '11 at 23:25
How many times do I roll an unfair die to determine its bias?
oct 30 '11 at 4:36
Which base of numerical system have $\frac 15 = 0.33333\ldots$?
sep 14 '11 at 0:36
What do $\pi$ and $e$ stand for in the normal distribution formula?
jul 7 '11 at 12:47
Is speed an important quality in a mathematician?
jul 5 '11 at 14:07
Non-Scientific questions solved by mathematics
jun 29 '11 at 13:34
If R and S are rings then $R \times S$ is never a field
jun 26 '11 at 21:01
Why is an empty function considered a function?
jun 18 '11 at 21:29
Reverse Erdős-Turan
jun 17 '11 at 13:28
How to study math to really understand it and have a healthy lifestyle with free time?
jun 16 '11 at 11:07
How do the Catalan numbers turn up here?
jun 5 '11 at 17:52
Collatz finally solved?
may 31 '11 at 18:32
How to become eloquent mathematician?
apr 25 '11 at 0:04
What's better strategy to handle tons of formulas, definitions?
apr 18 '11 at 8:43
Is this a known algebraic identity?
apr 18 '11 at 8:38
What is the 0-norm?
apr 18 '11 at 8:33
Representation of integers
nov 20 '10 at 11:35
Given $a_{1}=1, \ a_{n+1}=a_{n}+\frac{1}{a_{n}}$, find $\lim \limits_{n\to\infty}\frac{a_{n}}{n}$
nov 9 '10 at 2:33
$x^y = y^x$ for integers $x$ and $y$
