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14
22 votes
15 answers

Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$?

sequences-and-series discrete-mathematics proof-strategy Feb 5 at 21:52 glebovg
math.stackexchange.com

6
19 votes
4 answers

Why is elliptic curve cryptography not widely used, compared to RSA?

public-key rsa elliptic-curves Mar 3 at 4:18 JohnC
crypto.stackexchange.com

4
15 votes
11 answers

$ \lim\limits_{n \to{+}\infty}{\sqrt[n]{n!}}$ is infinite

homework real-analysis sequences-and-series limit Jun 14 '12 at 17:18 Chris's wise sister
math.stackexchange.com

5
10 votes
1 answer

What is the most efficient way to compute factorials modulo a prime?

algorithms efficiency integers May 15 at 22:02 Pascal Grudler
cs.stackexchange.com

2
9 votes
4 answers

Can Suffix trees be used to find all common substrings?

ds.algorithms string-matching Nov 24 '12 at 7:20 Community
cstheory.stackexchange.com

3
7 votes
2 answers

Elementary proof of $\mathbb{Q}(\zeta_n)\cap \mathbb{Q}(\zeta_m)=\mathbb{Q}$ when $\gcd(n,m)=1$.

abstract-algebra algebraic-number-theory field-theory Mar 16 '12 at 3:12 KCd
math.stackexchange.com

1
6 votes
2 answers

Prove $\lim\limits_{n\to\infty}na_n\ln(n)=0$

calculus sequences-and-series limit Apr 26 '12 at 3:49 J. M.
math.stackexchange.com

1
6 votes
2 answers

A recursive sequence generated by a polynomial

dynamical-systems contest-math May 9 '12 at 11:52 rschwieb
math.stackexchange.com

1
6 votes
1 answer

Finding a worst case of heap sort

algorithms data-structures algorithm-analysis sorting Apr 29 '12 at 10:04 Alex ten Brink
cs.stackexchange.com

2
4 votes
1 answer

Master theorem and constants independent of $n$

algorithm-analysis asymptotics recurrence-relation mathematical-analysis master-theorem Feb 2 at 13:24 Raphael
cs.stackexchange.com

1
4 votes
2 answers

Shortest string containing all fixed-length substrings

ds.algorithms co.combinatorics fl.formal-languages Jul 21 '11 at 12:00 uckelman
cstheory.stackexchange.com

2
4 votes
2 answers

computation of the sum

combinatorics statistics binomial-coefficients approximation Apr 24 '12 at 19:20 Michael
math.stackexchange.com

1
4 votes
2 answers

How to evaluate this integral?

complex-analysis integral definite-integral Mar 20 '12 at 11:41 Américo Tavares
math.stackexchange.com

1
4 votes
2 answers

Why does $\lim_{n\to\infty} z_n=A$ imply $\lim_{n\to\infty}\frac{1}{n}(z_1+\cdots+z_n)=A$?

complex-analysis Jan 30 '12 at 2:29 Paul
math.stackexchange.com

2
3 votes
3 answers

Reference: Elliptic curves as complex tori

reference-request elliptic-curves Apr 18 '12 at 14:36 Álvaro Lozano-Robledo
math.stackexchange.com

2
3 votes
1 answer

Encoding the sequence 0110 and determining parity, data bit and value

coding-theory Apr 23 '12 at 17:13 Ran G.
cs.stackexchange.com

1
3 votes
1 answer

Computing the running time of a divide-by-4-and-conquer algorithm

algorithms algorithm-analysis runtime-analysis recurrence-relation Sep 18 '12 at 22:12 Gilles
cs.stackexchange.com

1
2 votes
3 answers

Finding the limit of a weird sequence function?

real-analysis Apr 13 at 1:58 GArunkumar
math.stackexchange.com

1
2 votes
3 answers

Advice on using the Karamata Inequality

algebra-precalculus inequality Apr 30 '12 at 18:40 N. S.
math.stackexchange.com

1
1 vote
2 answers

Determine the coefficients of an unknown black-box polynomial

polynomials numerical-methods interpolation Apr 26 '12 at 21:44 Lubin
math.stackexchange.com

2
1 vote
1 answer

Number of projective points on a curve

number-theory algebraic-number-theory zeta-functions Apr 16 '12 at 3:59 Gerry Myerson
math.stackexchange.com

1
1 vote
2 answers

Count unhappy numbers in a large interval

algorithms dynamic-programming Mar 27 at 12:56 Community
cs.stackexchange.com

2
0 votes
4 answers

Prove or disprove a group with order $p^3$ is abelian if its has a normal subgroup of order $p^2$

group-theory Apr 22 '12 at 12:19 Harry
math.stackexchange.com

2
0 votes
2 answers

Help me with this Limit

calculus limit contest-math May 9 '12 at 23:17 J. M.
math.stackexchange.com

1
0 votes
1 answer

32bit 64bit referenced library

.net visual-studio-2008 64bit 32bit Mar 16 '10 at 17:58 Jim Counts
stackoverflow.com