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22148
bio website gottwurfelt.wordpress.com
location Atlanta, GA
age 31
visits member for 4 years, 5 months
seen 19 hours ago

Data scientist and math blogger.


Dec
8
answered Why is $\frac {1\cdot2\cdot3\cdot…\cdot n}{(n+1)(n+2)…(2n)}\le \frac 1 {n+1}$
Dec
8
awarded  Caucus
Dec
5
comment Chance on pairs when picking 'Sinterklaas tickets'
In the limit of large $n$, the number of 2-cycles of a permutation on $n$ elements is Poisson-distributed with mean $1/2$. (For $k$-cycles, it's $1/k$.) In particular, it's zero with probability $e^{-1/2}$. Restricting to derangements doesn't change this too much. This is a high-level explanation for the asymptotic result quoted in OEIS.
Dec
4
reviewed Edit Can one give me some concrete examples explaining Picard's Great Theorem
Dec
4
revised Can one give me some concrete examples explaining Picard's Great Theorem
corrections
Dec
4
answered What does $\overline{z}\mathbb{1}$ and $\underline{z}\mathbb{1}$ mean?
Dec
4
answered Why is it that $f(x)$ is even if $f(-x) = f(x)$?
Dec
3
reviewed Reject and Edit Show that $f$ is a bivariate density
Dec
3
reviewed Approve computational-complexity tag wiki excerpt
Dec
3
reviewed Approve infinite-graphs tag wiki excerpt
Dec
1
answered How can $\mathbb Q$ be countable, when there is no “next” rational number?
Nov
24
comment Will it become impossible to learn math?
I don't know this book, but I am intrigued. I think this may shed some light on the original question: there could be an upper limit on the depth of possible research imposed by the human lifespan.
Nov
24
answered Examples of Mathematics in Court
Nov
21
revised How are we able to calculate specific numbers in the Fibonacci Sequence?
formatting
Nov
20
answered Analytic Combinatorics to asymptotically estimate the number of objects of size at most n?
Nov
19
comment Numerical value of $\sum_{p \in \mathcal P} \frac1{p\ln p}$
Your difference should be $1/(2 \log 2)$, not $1/2$.
Nov
19
comment How to draw greek letters on paper / blackboard?
I have seen $\phi$ and $\varphi$ used by the same lecturer in the same lecture (in physical chemistry). One was pronounced "fee" and the other "fie". I found this lecture essentially impossible to follow because I thought of those two glyphs as interchangeable.
Nov
19
comment Prove that $\sum_{n=0}^{\infty }\frac{(2n+1)!!}{(n+1)!}2^{-(2n+4)}=\frac{3-2\sqrt{2}}{4}$
Yes - that numerical value corresponds to your analytical value.
Nov
19
comment Prove that $\sum_{n=0}^{\infty }\frac{(2n+1)!!}{(n+1)!}2^{-(2n+4)}=\frac{3-2\sqrt{2}}{4}$
As a check on this value, when the sum is computed numerically one gets 0.1035533906.
Nov
17
answered How can I solve $m^2+n^2=5077$