User hamza boulahia - Mathematics Stack Exchange

hamza boulahia

Member for 6 years, 10 months
Last seen more than a week ago

14 Questions

Score Activity Newest Views

6 votes

4 answers

5k views

Verify the following limit using epsilon-delta definition: $ \lim_{(x,y)\to(0,0)}\frac{x^2y^2}{x^2+y^2}=0$

asked Aug 16, 2019 at 18:10

3 votes

2 answers

393 views

How to calculate this limit without L'Hopital rule?

asked Nov 16, 2018 at 14:19

3 votes

3 answers

365 views

Does this integral converge $\int_{\mathbb{R}^2}\frac{1}{x^4y^4+1}\ dxdy $?

asked Jan 14, 2017 at 13:11

3 votes

3 answers

202 views

How to properly describe or define symmetric (even) function in $\mathbb{R}^n$

asked Nov 28, 2017 at 15:52

2 votes

0 answers

175 views

Determine all integers (bigger than 1) such that $\frac{2^n+1}{n^2}$ is an integer [duplicate]

asked Jan 2, 2018 at 15:13

2 votes

1 answer

120 views

How to show that $ \sum_{k=1}^{2^n}\frac{1}{k}\geq 1+\frac{n}{2}$? [duplicate]

asked Aug 29, 2019 at 14:17

1 vote

3 answers

398 views

How to calculate this Dirac integral?

asked Oct 14, 2017 at 11:44

1 vote

3 answers

491 views

how to calculate the following expression?

asked Dec 20, 2017 at 19:28

1 vote

1 answer

69 views

How to solve this non-linear differential equation of 2nd order?

asked Jan 16, 2017 at 16:05

0 votes

3 answers

85 views

Find a function that satisfies $f(\sin(x))+f(\cos(x))=\left(\frac{2}{\sin(2x)}\right)^2$

asked Jan 25, 2017 at 15:41

0 votes

1 answer

97 views

Calculating the inverse function of $f(x)=1+x\cdot \ln(x)-\ln(x)^2$

asked Jan 31, 2017 at 20:06

0 votes

2 answers

142 views

Calculate the $n^{th}$ derivative of this functions?

asked Nov 20, 2018 at 12:48

0 votes

2 answers

100 views

How to "quickly" solve the following linear system of equations?

asked Jan 17, 2019 at 16:38

-2 votes

2 answers

320 views

Theorem of null integral?

asked Mar 1, 2018 at 17:16