leonbloy

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12,156 reputation

21136

bio	website	hjg.com.ar
	location	Buenos Aires, Argentina
	age	46
visits	member for	2 years, 10 months
	seen	7 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/

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386 Answers

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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?

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12,156 Reputation

+10	How can I evaluate $\sum_{n=0}^\infty (n+1)x^n$
+10	Direct Proof that $1 + 3 + 5 + \cdots+ (2n - 1) = n\cdot n$
+10	Do we know if there are more primes with even leading digits or odd leading digits?
+15	What is the inverse z transform of 1/(z-1)^2?

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8 Questions

votes activity newest

22	A probabilistic game with balls and urns
17	“Casual” mathematical facts with practical consequences
12	Sum with binomial coefficients: $\sum_{k=1}^m \frac{1}{k}{m \choose k} $
7	Some maps of the land of mathematics?
6	Inequality with central binomial coefficients

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146 Tags

227 probability × 112	62 linear-algebra × 31
144 sequences-and-series × 17	51 matrices × 23
131 combinatorics × 54	49 discrete-mathematics × 5
76 statistics × 38	45 proof-strategy × 2
70 probability-theory × 36	42 fourier-analysis × 19

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44 Accounts

	Stack Overflow	19,761 rep	33263
$Mathematics Stack Exchange$	Mathematics	12,156 rep	21136
	Spanish Language & Usage	2,639 rep	514
	Cross Validated	869 rep	29
	Server Fault	517 rep	312

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Caucus	Pundit
Nice Answer × 12	Enlightened
Mortarboard	Custodian
Strunk & White	Autobiographer
Necromancer × 3	combinatorics

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688 Votes Cast

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