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Jan
12
revised Fibonacci identity: $f_{n-1}f_{n+1} - f_{n}^2 = (-1)^n$
added 35 characters in body
Jan
12
comment How to find the numbers of Bezout identity for two numbers
Does this help: math.stackexchange.com/a/2995/1102 ?
Jan
12
comment Limit of $nx_n$
See also: math.stackexchange.com/a/3220/1102
Jan
12
revised Sum: $\sum_{n=1}^\infty\prod_{k=1}^n\frac{k}{k+a}=\frac{1}{a-1}$
added 883 characters in body
Jan
12
answered Sum: $\sum_{n=1}^\infty\prod_{k=1}^n\frac{k}{k+a}=\frac{1}{a-1}$
Jan
11
revised Sum: $\sum_{n=1}^\infty\prod_{k=1}^n\frac{k}{k+a}=\frac{1}{a-1}$
edited tags
Jan
11
comment Closed form for ${\large\int}_0^\infty\frac{x-\sin x}{\left(e^x-1\right)x^2}\,dx$
Where did you come across this?
Jan
10
comment How many ways can you put 8 red, 6 green and 7 blue balls in 4 indistinguishable bins?
Is this from some programming contest?
Jan
10
comment How are contest problems designed?
This might get closed. Perhaps you should rephrase it as a reference request to some article by a contest-math creator or something...
Jan
10
comment Integer part of a sum (floor)
@CFG: I don't understand. What is wrong with mentioning the source? Someone who has physical access can take a look.
Jan
10
revised How find this $x_{1},x_{2},\cdots,x_{1994}$ with this following system equation $3+2x_{i+1}=3|x_{i}-1|-|x_{i}|$
edited tags
Jan
10
revised How find this $x_{1},x_{2},\cdots,x_{1994}$ with this following system equation $3+2x_{i+1}=3|x_{i}-1|-|x_{i}|$
added 1 character in body
Jan
10
comment Finding a separating family of subsets of $[n]$ of size $n+1$.
Yes, clearer now.
Jan
10
comment Finding a separating family of subsets of $[n]$ of size $n+1$.
Nope. Still not clear. Are you selecting $\log_2 n + 1$ subsets? (you have it written as elements). Is your question: I can select $\log_2 + 1$ subsets, and given any two elements of $[n]$ you select, one of my selected subsets will only have one of the elements you have selected?
Jan
10
comment Finding a separating family of subsets of $[n]$ of size $n+1$.
Can you clarify the $\lceil\log_2 n\rceil + 1$ part? Where are you actually using it in the question?
Jan
10
comment How find this $x_{1},x_{2},\cdots,x_{1994}$ with this following system equation $3+2x_{i+1}=3|x_{i}-1|-|x_{i}|$
Take it easy. You misunderstand. I said why don't you include such info... which means, please do include the info for not just this question, but all other questions you ask.
Jan
10
comment How find this $x_{1},x_{2},\cdots,x_{1994}$ with this following system equation $3+2x_{i+1}=3|x_{i}-1|-|x_{i}|$
Why don't you include such info with every question? (you seem to be asking a lot of questions posed to you as challenges)
Jan
10
comment How can i prove that this function is in the given bounds?
@Bean: Yeah, even the best have blind spots... don't worry.
Jan
10
comment How find this $x_{1},x_{2},\cdots,x_{1994}$ with this following system equation $3+2x_{i+1}=3|x_{i}-1|-|x_{i}|$
What have you tried? What is the source? Didn't the source provide you an answer? Are you looking to challenge the folks here?
Jan
10
revised How can i prove that this function is in the given bounds?
edited tags