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Undergraduate at University of Lund, Mathematics


Dec
10
accepted Ideal in a ring of continuous functions
Dec
9
awarded  Caucus
Nov
26
answered Fourier Transform of $\exp(-t)$
Nov
20
comment Functional inequalities involving cubing and incrementing
$f(x) = nx$, for $n>1$ ?
Nov
13
answered Proof using exhaustion $n^4 - 1$ is divisible by $5$ where $n$ is not divisible by $5$.
Nov
9
comment How to prove that the function $\tan(x)1_{(0,\pi/2)}$ lies in $L^p$ for $p\in (0,1)$?
I split the interak from $[0,1]$ and $[1,\infty)$, then i make the sub. $u\rightarrow \frac{1}{u}$ on the integral over $[1,\infty)$
Nov
9
comment How to prove that the function $\tan(x)1_{(0,\pi/2)}$ lies in $L^p$ for $p\in (0,1)$?
I split the interval from
Nov
9
answered How to prove that the function $\tan(x)1_{(0,\pi/2)}$ lies in $L^p$ for $p\in (0,1)$?
Oct
27
comment primitive root mod25
The order of any element that is relatively prime to 25 must divide $\phi(25)=20$, which is the total order, since there are $\phi(25)$ elements that are relatively prime to 25.
Oct
26
awarded  Custodian
Oct
26
reviewed Approve How to evaluate $\int_0^{\infty} \bigg(\frac{e^{-x}}{\sinh(x)} - \frac{e^{-3x}}{x}\bigg) \; dx$
Oct
25
revised How to evaluate $\int_0^{\infty} \bigg(\frac{e^{-x}}{\sinh(x)} - \frac{e^{-3x}}{x}\bigg) \; dx$
added 155 characters in body
Oct
25
revised How to evaluate $\int_0^{\infty} \bigg(\frac{e^{-x}}{\sinh(x)} - \frac{e^{-3x}}{x}\bigg) \; dx$
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Oct
25
answered How to evaluate $\int_0^{\infty} \bigg(\frac{e^{-x}}{\sinh(x)} - \frac{e^{-3x}}{x}\bigg) \; dx$
Oct
24
comment integration with pade approximant
You can actually evaluate this integral with elementary tools. Just make the sub $\sqrt{x}=t$ and integrate by parts
Oct
23
comment Cofinite Topology: Borel Algebra
Yeess, Exactly!
Oct
23
comment Cofinite Topology: Borel Algebra
Have you tried using the definition?
Oct
10
comment Proving n(log(n)) is O(log(n!))
Ah, of course! The exponential vanishes when taking logs on Stirlings formula..
Oct
10
answered Evaluating $ \sum\frac{1}{1+n^2+n^4} $
Oct
10
comment Proving n(log(n)) is O(log(n!))
Observe that $n\log(n)= \log(n^{n})$ I doubt that it is true..