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Don't have much time these days...


Oct
11
comment Good SAT learning resources?
@Moshe: I didn't downvote either, but I suppose you need to mark it as Community Wiki.
Oct
11
comment Different proofs of $\lim\limits_{n \rightarrow \infty} n \int_0^1 \frac{x^n - (1-x)^n}{2x-1} \mathrm dx= 2$
Interesting. Is it possible for you to add a little more detail for part 2? It would make it easier for anyone (not just me) who reads your answer.
Oct
11
revised Finding $\lim\limits_{n \to \infty} \sum\limits_{k=0}^n { n \choose k}^{-1}$
added 2 characters in body
Oct
11
comment $r$-dimensional Meshes of Trees
Your question is not clear. How exactly do you add binary trees so that the grid vertices are the leaves? For instance what leaves are part of the same tree?
Oct
11
comment Different proofs of $\lim\limits_{n \rightarrow \infty} n \int_0^1 \frac{x^n - (1-x)^n}{2x-1} \mathrm dx= 2$
@Chandru: Using theorems in real/complex analysis etc. For instance, without the n factor, the limit is zero, and that follows from the dominated convergence theorem.
Oct
11
accepted $5^n+n$ is never prime?
Oct
11
comment $5^n+n$ is never prime?
I am going to accept this, as it seems we are almost done proving that this number is prime (in this thread here: mersenneforum.org/showthread.php?p=228745). I suppose you will update the answer once we are sure, with the certificates and all that.
Oct
11
asked Different proofs of $\lim\limits_{n \rightarrow \infty} n \int_0^1 \frac{x^n - (1-x)^n}{2x-1} \mathrm dx= 2$
Oct
11
comment Finding derivative of f(x) = x^(arctan x)
Is this homework?
Oct
11
revised Finding derivative of f(x) = x^(arctan x)
tex; added 1 characters in body
Oct
11
revised Finding $\lim\limits_{n \to \infty} \sum\limits_{k=0}^n { n \choose k}^{-1}$
added 43 characters in body; added 12 characters in body
Oct
11
comment line segment covering problem
Same question at stackoverflow: stackoverflow.com/questions/3908139/…
Oct
11
answered Finding $\lim\limits_{n \to \infty} \sum\limits_{k=0}^n { n \choose k}^{-1}$
Oct
11
comment Precedence of set union, intersect, and difference?
I don't understand the downvote to this question.
Oct
11
revised Determining n in sigma ($\Sigma_{x=0}^n$)
added 2 characters in body
Oct
11
revised Determining n in sigma ($\Sigma_{x=0}^n$)
added 92 characters in body
Oct
11
answered Determining n in sigma ($\Sigma_{x=0}^n$)
Oct
10
awarded  Good Answer
Oct
10
comment Average amount of money received from pulling three random coins
@coffee: My apologies for confusing matters.
Oct
10
comment Average amount of money received from pulling three random coins
@Qiaochu: If someone says they consider the coins indistinguishable and order does not matter, the above could be a valid interpretation (perhap only in my own mind), but lets not continue this discussion further, as I do agree with you!