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ZFR

I am a Ph.D student in mathematics in one of the US university, and I am deeply interested in analysis.

However, now I spend a huge amount of time improving my background in order to master this area, studying general topology (+), linear algebra (+), measure theory(-) and functional analysis(-).

I am also very grateful to all the users who always support and help me!

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  • New York, NY, USA
  • Member for 7 years
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  • Last seen 16 hours ago

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18 Sum of series $\sum \limits_{k=1}^{\infty}\frac{\sin^3 3^k}{3^k}$ Jan 23 '17
16 Infinite group has infinitely many subgroups, namely cyclic subgroups. Nov 30 '17
15 Number which is simultaneously sum of 2 and 3 squares [closed] Nov 25 '17
14 $A+B+C+7$ is perfect square where $A,B,C$ numbers with repeating digits. Oct 29 '15
13 A finite set is closed Jun 8 '15
12 Solve an equation of 4th degree Apr 19 '16
11 Every separable metric space has a countable base Jun 3 '16
10 If $\lim_{x \to \infty} (f(x)-g(x)) = 0$ then $\lim_{x \to \infty} (f^2(x)-g^2(x)) = 0\ $: False? Nov 12 '15
10 Looking for a non-combinatorial proof that $a! \cdot b! \mid (a+b)!$ Feb 2 '16
8 The equivalence of definitions Riemann integral Dec 31 '15
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