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bio website gottwurfelt.wordpress.com
location San Francisco, CA
age 30
visits member for 3 years, 9 months
seen Apr 8 at 18:07

Quantitative analyst and math blogger.


Aug
18
comment What is the importance of the Collatz conjecture?
$500 is a fairly large prize by Erdos' standards. See math.ucsd.edu/~fan/ep.pdf and math.niu.edu/~rusin/known-math/93_back/prizes.erd . (These are the only two lists I could find with dollar figures on them; neither actually includes the Collatz problem.)
Aug
18
comment Averaging 2 roots of a cubic polynomial
Just out of curiosity, which generalizations have you tried? For example, are you averaging two roots of the higher-degree polynomial, or all the roots except one?
Aug
15
comment Is there a name for $[0,1]$?
"Numbers in the unit interval" works.
Aug
14
awarded  Commentator
Aug
14
comment Fundamental group of the double torus
However, if the original answer had included the magic words "see Exercise 0.2", this would be a perfectly fine answer. (Note for those who don't follow the link: Baez gives the solution there. I don't think it makes sense to just give a link to where somebody has asked a question.)
Aug
14
comment Asimov quote about “eight million trillion” arrangements of amino acids
Asimov was trained as a chemist. I think he would have known better and someone else made a mistake.
Aug
13
answered Asimov quote about “eight million trillion” arrangements of amino acids
Aug
13
answered Is it possible to 'split' coin flipping 3 ways?
Aug
4
comment Why is Euler's Gamma function the “best” extension of the factorial function to the reals?
The other Gamma functions mentioned here also satisfy that functional equation.
Aug
4
comment Need faster division technique for $4$ digit numbers.
Not a bad idea, but the gcd is 2, which doesn't help much.
Jul
28
comment Probability to find connected pixels
You are attempting to do what's known as "polyomino enumeration". This is in general quite difficult.
Jul
28
answered Visualising functions from complex numbers to complex numbers
Jul
27
awarded  Beta
Jul
26
comment $n$ out of $ m$ theorems (some imply the rest)
I suspect that many examples of this phenomenon have m-n = 1 -- that is, that if all but one of a list of conditions holds, then all of them hold.
Jul
25
comment When you randomly shuffle a deck of cards, what is the probability that it is a unique permutation never before configured?
What BBischof said is correct.
Jul
25
answered When you randomly shuffle a deck of cards, what is the probability that it is a unique permutation never before configured?
Jul
24
comment Is there a relationship between e and the sum of n-simplexes volumes?
This seems like the sort of thing that might be mentioned at the blog "The n-category cafe", although I wouldn't know how to begin looking for it there.
Jul
24
comment Is there a closed-form equation for $n!$? If not, why not?
I know it's unsatisfying.
Jul
23
answered Proving that 1- and 2-d simple symmetric random walks return to the origin with probability 1
Jul
22
answered Good Physical Demonstrations of Abstract Mathematics