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Mathematics
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ithisa
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31
Proof that the hypergeometric distribution with large $N$ approaches the binomial distribution.
Mar 14, 2013
18
Combinatorial proof of $\sum^{n}_{i=1}\binom{n}{i}i=n2^{n-1}$.
May 11, 2013
14
Show that triangle-free planar graphs are four-colorable
Jul 28, 2013
13
Deducing a probability distribution from its moment-generating function
Apr 7, 2013
11
Seating of $n$ people with tickets into $n+k$ chairs with 1st person taking a random seat
Jan 30, 2013
8
Proving that a "prime graph" is connected
Aug 1, 2013
8
Contradiction in the rules regarding determinants and row operations?
Mar 21, 2013
7
Proving that G contains a cycle with at least $k+1$ edges
Jul 1, 2013
7
Is probability and the Law of Large Numbers a huge circular argument?
Aug 15, 2013
6
What's so special about a 2D plane in graph theory?
Jul 17, 2013
Top network posts
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72
Why are military drones shaped so strangely?
54
Why do oppressive regimes cheat in the election process rather than simply faking the results?
37
Why are Python and Ruby so slow, while Lisp implementations are fast?
37
Why is plain-hash-then-encrypt not a secure MAC?
35
Why are listed times of useful consciousness so low?