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seen Sep 3 '13 at 10:34

Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Feb
27
awarded  Nice Question
Oct
26
awarded  Yearling
Oct
16
awarded  Nice Question
Sep
3
asked Choosing $15$ out of $100$ whole numbers with difference of any $2$ divisible by $7$
Aug
28
accepted The limit of $\frac{|A_n|}{n^2}$
Aug
28
asked Fixed point of matrix
Aug
28
accepted Definition of parabolic matrix.
Aug
28
asked Definition of parabolic matrix.
Aug
28
revised The limit of $\frac{|A_n|}{n^2}$
edited tags
Aug
28
comment The limit of $\frac{|A_n|}{n^2}$
How can I explain the existence of limit witout actually try and compute it?
Aug
28
comment The limit of $\frac{|A_n|}{n^2}$
But, why the limit do exist?
Aug
28
revised Understanding proof regarding The Sum of the Totient Function
added 87 characters in body
Aug
28
asked Understanding proof regarding The Sum of the Totient Function
Aug
28
comment On proving the convergence of $1/n^2\sum_{1\le k\le n}\varphi(k)$
Yes, also $\sum_{n\leq x}\phi(n)=\frac{3}{\pi^{2}}x^{2}+O\left(x\log x\right)$, but I can't prove these.
Aug
28
comment On proving the convergence of $1/n^2\sum_{1\le k\le n}\varphi(k)$
+1, A question: May I say that the existence of that limit deduced only from your question(stated in my own words): For two "random" integers $a$ and $b$, what is the probability that they have no common factor?
Aug
28
comment On proving the convergence of $1/n^2\sum_{1\le k\le n}\varphi(k)$
From here: math.stackexchange.com/questions/461108/the-limit-of-fraca-nn2
Aug
27
revised On proving the convergence of $1/n^2\sum_{1\le k\le n}\varphi(k)$
added 79 characters in body
Aug
27
asked On proving the convergence of $1/n^2\sum_{1\le k\le n}\varphi(k)$