455 reputation
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age 23
visits member for 3 years, 2 months
seen Jun 22 at 17:26

I'm an experienced C++ programmer. B.Sc. student in pure mathematics department in Tel-Aviv university.

Some of my programming projects are:

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Aug
22
answered Almost sure convergence of generalized random harmonic series
Aug
22
comment Is there a lower bound for $\int_{B_{r}}f$ when $f$ is a positive function?
Having $c$ depend of $f$ makes no sense, as then you can take $c = \frac{\int f}{\omega_n r^n}$ to get a tight bound.
Aug
18
asked Almost sure convergence of generalized random harmonic series
May
18
awarded  Yearling
Jan
12
awarded  Self-Learner
Dec
27
comment Radius of convergence of $\sum \frac {a_n}{b_n} z^n$
@martycohen: take $x_n = \sqrt[n]{\frac{|a_n|}{|b_n|}}$ and $y_n = \sqrt[n]{|b_n|}$, then apply the inequality I said and divide both sides by $\limsup y_n$.
Dec
26
comment Is this proof, that $\sqrt{n}$ is irrational for all non-square $n \in \mathbb{N}$, correct or not?
It should be $nq^2 = p^2$.
Dec
26
answered Radius of convergence of $\sum \frac {a_n}{b_n} z^n$
Dec
26
answered Show that if $a\neq 0$ in $M_2(\Bbb{R})$, the smallest ideal containing $a$ is the ring itself
Dec
25
comment How can I find maximum and and minimum values of $ f(x,y)=xye^{-(x+y)}$?
@MuhammadKhalifaTranCer: see the calculations posted.
Dec
25
revised How can I find maximum and and minimum values of $ f(x,y)=xye^{-(x+y)}$?
added 2038 characters in body
Dec
25
comment How can I find maximum and and minimum values of $ f(x,y)=xye^{-(x+y)}$?
@MuhammadKhalifaTranCer: I do not know your calculations. Likely you forgot one of the cases somewhere. I can try to post the calculations here, but they are likely to be different from yours, so I can't say whether it is beneficial for you.
Dec
25
awarded  Commentator
Dec
25
comment How can I find maximum and and minimum values of $ f(x,y)=xye^{-(x+y)}$?
@MuhammadKhalifaTranCer: Nope. You have $y=0$ or $x=1$. The same goes for $f_y$. But this only gives you the interior points, which according to wolfram happen to not be the maxima and minima in the region. The extrema actually achieved on the boundary, which is the second half of the question.
Dec
25
comment How can I find maximum and and minimum values of $ f(x,y)=xye^{-(x+y)}$?
@MuhammadKhalifaTranCer I don't think so. Recheck your computations.
Dec
25
answered How can I find maximum and and minimum values of $ f(x,y)=xye^{-(x+y)}$?
Dec
25
comment How to find the limits by using series
Please write the formula using LaTeX, otherwise it is unclear what you mean.
Dec
25
answered Distribute 10 white and 10 black balls into 20 distinct boxes s.t. no box is empty?
Dec
25
awarded  Yearling
Dec
25
revised Finding power series representation
format math