Reputation
1,526
Next privilege 2,000 Rep.
Edit questions and answers
Badges
5 19
Newest
 Custodian
Impact
~20k people reached

Dec
7
comment Compute $\lim_{n\to\infty }\int_E \sin^n(x)dx$
Well, you wrote that $\sin^n(x)\to 0$ pointwise. The right term would be "almost everywhere".
Dec
7
comment Compute $\lim_{n\to\infty }\int_E \sin^n(x)dx$
What happens when $|\sin(x)|=1$?
Nov
24
revised Find a sequence which uniformly converges f(z), and is of the form $\displaystyle\sum_{i=1}^{\infty} \frac{c_i}{w_i-z}$
Incorrect tag removed, better LaTeX
Nov
24
suggested approved edit on Find a sequence which uniformly converges f(z), and is of the form $\displaystyle\sum_{i=1}^{\infty} \frac{c_i}{w_i-z}$
Nov
16
awarded  Custodian
Nov
16
revised Find $\max_f | f'(a)|$ where $f$ ranges over a class of functions.
Obvious errors and improved formatting
Nov
16
comment Find $\max_f | f'(a)|$ where $f$ ranges over a class of functions.
An open ball? Really? What would be the meaning of $B'_a(a)$? I think that $B_a\colon z\mapsto\dfrac{|a|}{a}\dfrac{a-z}{1-\overline{a}z}$.
Nov
16
suggested approved edit on Find $\max_f | f'(a)|$ where $f$ ranges over a class of functions.
Nov
16
revised What are the residues of $\frac{z^2 e^z}{1+e^{2z}}$?
Improve answer
Nov
16
answered What are the residues of $\frac{z^2 e^z}{1+e^{2z}}$?
Nov
12
answered Computing complex derivative of $zRe(z)$
Nov
12
comment Evaluate $\oint \limits_C \frac{z^2+1}{(2z-i)^2}dz$ using residue theorem
This method works only for simple pole. You'll surely find the right formula in the wikipedia Residue article. Note: the integral can also be computed using only Cauchy's integral formula.
Nov
11
revised How to get the geometric shape of an amount with complex numbers?
Removed incorrect tag, removed image and inserted LaTeX code instead.
Nov
11
comment How to get the geometric shape of an amount with complex numbers?
...centered at $\dfrac{1-i}2$.
Nov
11
suggested approved edit on How to get the geometric shape of an amount with complex numbers?
Sep
8
awarded  Yearling
Feb
20
comment Suppose $f:\mathbb{R} \to \mathbb{R}$ is such that $f(x) \leq 0$ and $f''(x) \geq 0, \forall x.$ Prove $f$ is constant.
Proof idea: $f$ is convex so it lies above its tangents. Their slopes can't be non-zero or else $f$ would have a $+\infty$ limit at $-\infty$ or $+\infty$.
Feb
17
answered Evaluate $P(A^C\cup \!\,B^C)$
Jan
8
revised Finding radius of convergence for taylor series of $\frac{z}{e^z-1}$
added 23 characters in body
Jan
8
comment Finding radius of convergence for taylor series of $\frac{z}{e^z-1}$
Good remark! I'll modify my answer.