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Top Questions
27
votes
Probability of a Random Walk crossing a straight line
pr.probability
random-walk
catalan-numbers
co.combinatorics
asked May 3, 2011 at 10:22
mathoverflow.net
23
votes
Asymptotic behaviour of sums of consecutive powers
number-theory
asymptotics
asked Sep 12, 2011 at 20:42
math.stackexchange.com
21
votes
Probability of two vectors lying in the same orthant
reference-request
pr.probability
asymptotics
euclidean-geometry
asked Nov 13, 2015 at 1:38
mathoverflow.net
11
votes
Different styles for the same document
formatting
conditionals
preamble
asked Jan 20, 2013 at 17:19
tex.stackexchange.com
10
votes
Normal orthant probability in six variables
probability
multivariable-calculus
reference-request
multiple-integral
geometric-probability
asked Jun 3, 2019 at 0:37
math.stackexchange.com
10
votes
Helpmate of arbitrary length
rules
checkmate
problems
asked Sep 18, 2017 at 19:43
chess.stackexchange.com
9
votes
Expected centered entropy of the binomial distribution
pr.probability
it.information-theory
asymptotics
entropy
binomial-distribution
asked Mar 16, 2015 at 16:43
mathoverflow.net
8
votes
Historical motivation for the 1200-1800ish rating average
rating
history
elo
asked Feb 16, 2021 at 18:44
chess.stackexchange.com
7
votes
Expectation of Maximum of Uniform Multinomial Distribution
pr.probability
probability-distributions
asymptotics
random-walk
asked Oct 30, 2013 at 15:00
mathoverflow.net
7
votes
Low rate c-uniform pairwise intersecting set systems
co.combinatorics
projective-geometry
asked May 5, 2011 at 15:06
mathoverflow.net
1
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Top Answers
85
Can't argue with success? Looking for "bad math" that "gets away with it"
math.stackexchange.com
49
Prove that 16, 1156, 111556, 11115556, 1111155556… are squares.
math.stackexchange.com
34
Show that $\operatorname{rank}(A+B) \leq \operatorname{rank}(A) + \operatorname{rank}(B)$
math.stackexchange.com
33
How to prove the sum of squares is minimum?
math.stackexchange.com
28
How to show $p_n$ $\leq$ $2^{2^n}$?
math.stackexchange.com
21
How to find the value of $\sin{\dfrac{\pi}{14}}+6\sin^2{\dfrac{\pi}{14}}-8\sin^4{\dfrac{\pi}{14}}$
math.stackexchange.com
20
Mystery about $\sum_{n\geqslant 1}2^{-n!}$
math.stackexchange.com
16
Why does $\sum_{n = 0}^\infty \frac{n}{2^n}$ converge to 2?
math.stackexchange.com
12
Find the sum of p+q?
math.stackexchange.com
12
Finding a Pythagorean triple $a^2 + b^2 = c^2$ with $a+b+c=40$
math.stackexchange.com
11
Maximum product $ab$ for $a+b=k$ - proof based on AM-GM inequality
math.stackexchange.com
11
How many numbers between $100$ and $900$ have sum of their digits equal to $15$?
math.stackexchange.com
11
why $\lim\limits_{x\to-\infty}(\sin x+2)\ln(-x)=\infty$?
math.stackexchange.com
10
Interesting and accessible topics in graph theory
mathoverflow.net
9
Examples of common false beliefs in mathematics
mathoverflow.net
9
How to entertain a crowd with mathematics?
math.stackexchange.com
9
computing ${{27^{27}}^{27}}^{27}\pmod {10}$
math.stackexchange.com
9
Largest $k$ for which $a^k +b^k \leq c$
math.stackexchange.com
8
Chess Board and Knights
math.stackexchange.com
8
Fastest way to try all passwords
math.stackexchange.com
7
Where can I find out more on Collatz-conjecture like sequences?
math.stackexchange.com
7
Solving an Exponential Equation
math.stackexchange.com
7
Show that the function $s(x) = e^x -e^{-x}$ is one-to-one.
math.stackexchange.com
7
Solution for exponential function's functional equation by using a definition of derivative
math.stackexchange.com
7
How to show that $\gcd(a,b) = ax+by \implies \gcd(x,y)=1$?
math.stackexchange.com
7
Taylor series $\ln(\tan(x))-\ln(x)$ for point $0$
math.stackexchange.com
7
Does the parameters $d, a, b$ uniquely determine a strongly regular graph?
math.stackexchange.com
7
Combinatorics-number of permutations of $m$ A's and at most $n$ B's
math.stackexchange.com
7
Prime factorization knowing n and Euler's function
math.stackexchange.com
7
How do you calculate the modulo of a really high number with a large power, with a really high mod number?
math.stackexchange.com
1
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