346 reputation
111
bio website
location
age
visits member for 2 years, 1 month
seen Jun 11 '13 at 13:01

I am a PhD student my major is Fractal and ergodic theory.


Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Oct
30
awarded  Yearling
May
14
answered How to integrate $\int_0^\infty e^{-ty^2} \sin t dt$
May
14
comment The unique root on (1,2)
I just give some ideas, firstly, there dose exist a root between 1 and 2 using intermediate value theorem, but I need to prove this root is unique
May
14
asked The unique root on (1,2)
May
13
answered Proving that $\frac{\sigma_{n-1}}{\omega_n} = n$ in $\mathbb{R}^n$
May
13
asked The definition of Pisot number
May
10
accepted An estimation in mathematical analysis
May
10
accepted Polynomial with bounded coefficients
May
10
accepted Rotation on the unit circle K
May
10
accepted Minimal value of a polynomial
May
10
accepted Topological properties under the Lipschitz map
May
10
accepted Some basic properties of Pisot number
May
10
comment Question on closures and closed sets
Should we consider the metric?
May
7
answered Beta Function : Proof
May
7
comment How can I prove that a polynomial has no rational roots?
math.stackexchange.com/questions/383186/…; may be helpful
May
7
answered Convergence of sequence uneven/even
May
7
comment Convergence of sequence uneven/even
$0\leq\frac{1.3.5\cdots(2n-1)}{2.4.\cdots(2n)}\leq \frac{1.3.5\cdots(2n-1)}{\sqrt{1.3}.\sqrt{3.5}.\cdots(\sqrt{(2n-1)(2n+1)})}=\fra‌​c{1}{\sqrt{2n+1}}$
May
7
comment Lower bound of a polynomial
I think that the optimal bound is when the number of positive $a_n$ and negative $a_n$ are the same, therefore, they can offset each other perfectly.