leonbloy

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21136
bio website hjg.com.ar
location Buenos Aires, Argentina
age 46
visits member for 2 years, 10 months
seen 9 hours ago
stats profile views 1,012

PNGJ: https://code.google.com/p/pngj/

Stereograms: http://hjg.com.ar/st/

Guitar: http://leonbloyguitar.blogspot.com.ar/search/label/anime http://www.youtube.com/channel/UCW20bKZ9hapL5RNdE91ncwQ http://hjg.com.ar/ghibli/musica/


386 Answers

newest activity votes
45
Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$?
23
Finding the Robot
19
Why do engineers use the Z-transform and mathematicians use generating functions?
19
Direct Proof that $1 + 3 + 5 + \cdots+ (2n - 1) = n\cdot n$
14
What's the probability that a sequence of coin flips never has twice as many heads as tails?
13
Compute $\sum_{m>n=1}^{\infty} \frac{1}{m!n!}$
11
Probability that a stick randomly broken in five places can form a tetrahedron
11
Prove the convergence/divergence of $\sum \limits_{k=1}^{\infty} \frac{\tan(k)}{k}$
11
Attitude towards exercises in mathematics
10
Combinatorial proof that binomial coefficients are given by alternating sums of squares?
10
Intuitive explanation of the tower property of conditional expectation
10
What is the sequence (1, 7, 2, 22, 3, 11, 4, …)?
9
Probability of a random binary string containing a long run of 1s?
9
A hard problem from regular $n$-gon
9
How to solve this problem without the assistance of a calculator in under 3 minutes?
9
How can I evaluate $\sum_{n=0}^\infty (n+1)x^n$
8
Can the matrices $A$ and $I+A$ have the same determinant?
8
How can I calculate “most popular” more accurately?
8
Method for Constructing Poisson Processes
8
Median of a set of Integer
7
Asymptotics of $\sum_{k=0}^{n} {\binom n k}^a$
7
Are proofs by induction inferior to other proofs?
7
Confusion on unit impulse function $\delta(t)$
7
Which one result in maths has surprised you the most?
7
Intuitive understanding of the derivatives of $\sin x$ and $\cos x$
6
On factorizing and solving the polynomial: $x^{101} – 3x^{100} + 2x^{99} + x^{98} – 3x^{97} + 2x^{96} + \cdots + x^2 – 3x + 2 = 0$
6
Why is 8x8 matrix chosen for Discrete Cosine Transform?
6
Laplacian of a Smooth Function $f(\vec x) = 1/\|\vec x \|$ for $\| \vec x \| \geq 1$
6
What's the chance of an explicit series of integers in a limited random distribution?
6
Var(X_2months) = 2 Var(X_1month) with independent random variables?
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